This time to 28.0.0-MASTER+20261011-230237.
Category: TrueNAS
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Naming Change
- The release previously called TrueNAS 26 is now TrueNAS 27, beginning with RC.1 on October 6, 2026.
- The change reflects the year most users are expected to deploy and operate the release, similar to automobile model years.
- The release schedule is unchanged: TrueNAS 27.0 remains planned for early December 2026.
Simplified Versioning
- TrueNAS is dropping the previous year.month format such as
25.10and25.04. - Because TrueNAS now targets one major release per year, future major releases will simply follow the deployment year:
- TrueNAS 27
- TrueNAS 28
- etc.
- Minor releases will use sequential numbering such as 27.0, 27.1, 27.2, without representing specific months.
Why the Version Number Matters
- Version numbers are often checked during security reviews and audits.
- TrueNAS 27 is based on:
- Linux kernel 6.18
- OpenZFS 2.4
- The 27.x series will continue receiving regular security and maintenance updates.
Why Rename It at RC.1?
- RC.1 is when substantially more users and customers begin adopting the release.
- Renaming it now ensures that documentation, upgrades, and support references consistently use TrueNAS 27 before the final release.
What Has Not Changed
- Release date: early December 2026.
- Core code and overall feature set: largely unchanged from the TrueNAS 26 development releases.
- RC.1 does include additional improvements introduced since Beta.3, detailed separately in the RC.1 feature announcement.
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Release Overview
- TrueNAS 27 RC.1 is the first release candidate of the next major TrueNAS version.
- Previously developed as TrueNAS 26.
- Final TrueNAS 27.0 release is planned for early December 2026.
- Core platform:
- OpenZFS 2.4
- Linux kernel 6.18
TrueSearch & WebShare
- TrueSearch
- Server-side indexing of filenames, metadata, and file contents.
- Provides fast searches across large NAS datasets.
- Integrates with macOS Spotlight over SMB.
- Avoids clients having to crawl network shares themselves.
- WebShare
- Browser-based access to SMB/NFS-compatible files.
- Works from desktops, tablets, and phones.
- Preserves existing ACLs and permissions.
- Supports file previews, snapshots, sharing, and file collection.
- Integrates with Active Directory.
- Both features require TrueNAS Connect.
Fusion Pools 2.0
- Expands ZFS hybrid flash/HDD storage capabilities.
- Special vdevs can now use RAIDZ, rather than being limited to mirrors.
- Flash special vdevs can accelerate:
- Metadata
- Small files
- Selected datasets
- A special vdev can also participate in the ZFS intent log (ZIL) for synchronous writes.
- A dedicated SLOG still takes priority when available.
Live Dataset Tiering
- Available in TrueNAS Enterprise.
- Transparently moves data blocks between:
- High-performance flash storage
- Larger HDD capacity tiers
- Migration occurs without disrupting connected clients.
Stateful SMB Failover
- Available on TrueNAS Enterprise HA systems.
- SMB session state survives controller failover.
- Clients no longer need to reconnect or re-authenticate after failover.
- Interrupted large file transfers can continue instead of restarting.
OpenZFS 2.4 Improvements
- Up to 25% faster deduplication writes.
- Faster encryption on CPUs with AVX2.
- Improved write allocation to reduce fragmentation.
- Better responsiveness as pools become full.
- Adds:
- Default user quotas
- Group quotas
- Project quotas
- Time-window scheduling for scrubs
Linux 6.18 & Containers
- Updated hardware support, including:
- Broadcom tri-mode HBAs
- PCIe Gen5 switching
- New NVIDIA GPUs
- LXC containers are now fully supported, after being experimental in earlier TrueNAS releases.
TrueNAS Object Interface
- New Early Access feature.
- Provides native S3-compatible access directly to ZFS datasets.
- Available across TrueNAS editions.
- Can coexist with SMB, NFS, Active Directory, and WebShare access.
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What it does
- New TrueNAS storage plugin for Proxmox VE.
- Designed for Proxmox hosts using a separate TrueNAS server for storage.
- Improves on traditional NFS or LVM-over-iSCSI workflows.
- Provides a “one LUN per virtual disk”, VVOL-like model.
- Automates provisioning through the TrueNAS API.
Key benefits
- ZFS snapshots are offloaded to TrueNAS.
- Per-virtual-disk configuration, including
volblocksize. - Easier VM/disk migration.
- Reduces repetitive manual storage provisioning.
- Supports:
- iSCSI
- NVMe/TCP
Minimum versions
- TrueNAS: 25.10 or newer, because the plugin uses the versioned JSON-RPC WebSocket API.
- Proxmox VE 8.x+: required for iSCSI.
- Proxmox VE 9.x+: required for NVMe/TCP.
Licensing
- Free to use; not restricted to TrueNAS Enterprise.
- Currently distributed through GitHub.
Important limitation
The plugin does not completely replace file-based storage. Proxmox cannot store ISO images, vzdump backups, or other ordinary files on iSCSI/NVMe block storage, so an NFS or SMB share is still required for those purposes.
Bottom line
The plugin makes a dedicated TrueNAS server much more tightly integrated with a Proxmox cluster, particularly for VM disks. It combines automated per-disk ZFS zvol/LUN provisioning, snapshots, and tunability with iSCSI or NVMe/TCP, while NFS/SMB remains necessary for ISO and backup storage.
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Notable changes:
- Updates the Linux kernel to the latest 6.12 LTS release (v6.12.105).
- Fixes a kernel panic in the NFS server that could occur when a client’s dropped connection caused the same request to arrive twice (NAS-142560).
If an NFSv4.1 client lost its connection twice in quick succession, two copies of the same request could reach the server at the same time. Both were read from the session reply cache, but one thread could also modify that cached entry while the other read it, which caused a NULL pointer dereference and crashed the system. TrueNAS now leaves the cached reply untouched when replaying it. - Fixes a crash that could occur when unregistering an iSCSI target while a peer controller was leaving the cluster (NAS-142264).
On Enterprise HA systems, target unregistration during failover could follow a stale list pointer if another teardown ran at the same time, which crashed the system or corrupted memory. The affected code now restarts its list walk from the beginning after each removal instead of relying on a saved position. - Fixes a crash that could occur when a task management command arrived while an iSCSI session was being reassigned to a new access control group (NAS-142258).
AnABORT_TASKor other task management request received during session reassignment could dereference a pointer that was temporarily cleared, which crashed the task management thread. TrueNAS now keeps the previous access control group installed until the reassignment finishes. - Fixes a crash in the iSER (iSCSI over RDMA) target driver that could occur when a connection closed during active I/O (NAS-142161).
A response posted just before a connection closed could be released twice, and the second release read from memory that had already been reused, which crashed the target. TrueNAS now tracks response ownership correctly so this cannot happen. - Fixes a crash that could occur when a Fibre Channel target driver was unloaded while a target’s enabled state was still being changed (NAS-142126).
A queued request to enable or disable a target could still run after the target began unregistering, which re-armed a port whose driver was already partially torn down and crashed the system. TrueNAS now blocks queued work for a target once it starts unregistering. - Fixes an Enterprise HA networking issue that could let both controllers become active for the same IPv6 virtual IP (NAS-142303).
The VRRP service listened for advertisements on the wrong IPv6 address, so it never received the peer controller’s advertisements and considered itself the primary controller for every IPv6 VIP. TrueNAS now binds the listener to the correct address so failover state is tracked correctly. - Improves resilience to brief Non-Transparent Bridge (NTB) interruptions on Enterprise HA systems (NAS-142152).
A short NTB packet loss event could trigger an unnecessary cluster reset. TrueNAS now waits up to 60 seconds for the NTB link to recover before treating the peer controller as down. - Updates ZFS 2.3 from version 2.3.4 to 2.3.9 (NAS-142153, NAS-142538).
This update includes upstream fixes for silent read corruption after block cloning, data loss during redacted replication send, zvol sync writes that did not reach the ZIL, incomplete dRAID rebuilds, and a permission check gap that let a caller open a device without read access. There is no on-disk format change. - Fixes intermittent “permission denied” errors on NFS shares for users in Active Directory or LDAP environments (NAS-142228).
A brief winbind or SSSD outage could cause the kernel to cache an empty group list for a user. This stripped that user of access to any share that depended on group membership for up to 30 minutes, even after the directory service recovered. TrueNAS no longer treats these empty replies as valid. - Fixes an issue where a single unreachable container registry could stop TrueNAS from checking for app updates (NAS-142192).
If one registry returned an unexpected error, such as a certificate mismatch, the update check stopped for every remaining app. Affected apps could not be upgraded from the web interface until a later check succeeded. TrueNAS now logs the error for the failing image and continues checking the rest. - Reduces unnecessary restarts of the
ix-vendorservice caused by routine IPv6 network activity (NAS-142227).
Routers that send frequent IPv6 router advertisements could cause TrueNAS to treat each address lifetime refresh as a new address change, restarting the service every few seconds. TrueNAS now recognizes these refreshes and ignores them. - Fixes a serialization error in the reporting API when aggregated data was not requested (NAS-142197).
Calls toreporting.get_datawith aggregation disabled failed validation and logged a serialization warning instead of returning a clean result. This affected features, such as Dashboard graphs, that request non-aggregated reporting data. - Fixes an issue where testing an alert service could hide the real reason the test failed (NAS-140259).
A coding error in the alert service test handler raised an unrelated error before the actual failure reason could be reported, so users saw a misleading message instead of the real cause of a failed test. - Fixes Cloud Sync tasks that failed to run when cloud credentials contained certain special characters (NAS-142234).
Some characters in credential values could produce an invalid rclone configuration file, which caused the Cloud Sync task to fail. TrueNAS now escapes these characters when generating the configuration. - Fixes the snapshot task Lifetime field accepting invalid values of
0and-1(NAS-142610).
The web interface allowed a snapshot task to be saved with a lifetime of zero or a negative number, neither of which is a valid retention period. The field now rejects these values.
See the Release Notes and changelog for more details.
25.10.7 Documentation : https://www.truenas.com/docs/scale/25.10
Download : https://www.truenas.com/download-truenas-community-editionhttps://forums.truenas.com/t/truenas-25-10-7-is-now-available/67740
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26-BETA.3 Notable Changes
- Fixes crashes on systems that use Fibre Channel target mode (NAS-142014, NAS-142018).
The QLogic Fibre Channel target driver could follow a null target operations pointer from interrupt paths, and target mode could stay partly enabled after target registration failed. The driver now checks the pointer before it uses it and fails target enable when registration does not succeed. - Fixes cloud backup tasks that could stop the
middlewaredevent loop and silently disable every scheduled task (NAS-141948).
The cloud backup progress thread updated job progress from outside the event loop, which stopped the loop while themiddlewaredservice still reported as active. Cron jobs continued to fire and log, but every scheduled task did nothing and raised no error. Progress updates now run on the event loop. - Fixes a memory leak in the console CLI that could exhaust system memory (NAS-141238).
Continuous input on the physical console, such as a stuck key on an attached keyboard, made the CLI process grow to tens of gigabytes of RAM until the kernel out-of-memory killer stopped it. Console CLI memory use is now bounded regardless of how much input arrives. - Fixes upgrades to TrueNAS 26 that leave Active Directory non-functional (NAS-141469).
On an Active Directory member server, the directory cache could go FAULTED after the post-upgrade reboot and winbind could fail to start, which locked users out until an administrator left and rejoined the domain. A related defect also logged a false message once an hour that the machine account password changed. The member state now survives the upgrade. - Fixes faulty parsing of
smartctloutput that filled/var/log/middlewared.logwith errors (NAS-141215, NAS-141951).
Systems updated to 25.10.5 logged repeated parse errors from drive health checks. The parser handles the full range ofsmartctloutput so drive health checks complete without errors. - Improves failover speed by moving the remote disk retaste call out of the failover event (NAS-141988).
A remote disk scan ran inside the critical failover path, where it could delay failover while services stayed offline. The scan now runs outside that path. - Fixes a database migration failure when updating from TrueNAS 25.04.2.6 to 25.10.3.1 (NAS-141221).
The update stopped a few seconds after it started with an[EFAULT]error from themigratecommand. The migration now completes so the update finishes. - Fixes an upgrade that forced the update profile to Mission Critical on Enterprise systems (NAS-140905).
A database migration set the update profile to Mission Critical on every Enterprise system, regardless of the profile the running version actually used. The system then raised a warning that the running system version profile did not match the selected update profile. The migration now keeps the profile that the system already used. - Fixes replication failures for source systems that host a container when the task uses Full Filesystem Replication (NAS-140878).
After an upgrade to TrueNAS 26, a replication task to a remote system on an earlier release could fail with an error about a failure to transfer all children of the container dataset. Turning off Full Filesystem Replication avoided the failure. These tasks now complete. - Fixes several issues with the SSH credentials used for replication (NAS-141677).
The system now updates SFTP cloud credentials when the SSH key pair they use is removed, rejects encrypted SSH private keys consistently during validation, returns a clear error when semi-automatic remote setup uses a key pair that no longer exists or is invalid, and completes SSH pairing with TrueNAS 13 systems during remote replication setup. - Fixes Active Directory domain join failures caused by combined IPv4 and IPv6 PTR record updates (NAS-140548).
nsupdatesent IPv4 and IPv6 PTR records in a single transaction, which returned a NOTZONE error and stopped the domain join. The records now go out in separate transactions. - Fixes SMB advertising file permissions that the file system does not enforce (NAS-141608).
ZFS does not let theowner@,group@, andeveryone@entries carryWRITE_ACLorWRITE_OWNER, but Samba still reported those rights to clients. Samba now advertises only the rights the file system enforces, so SMB and NFS clients see the same permissions. Entries for named users and groups keep these rights. - Improves the speed of dataset creation with the SMB, Multiprotocol, and Apps presets (NAS-141154, NAS-141161).
Creating a dataset with one of these presets could take several seconds on 26-BETA.1 and 26-BETA.2 because of the per-credential access check that runs during creation. Batched access probes restore normal dataset creation speed. - Adds support for dedicated spares on pools that use dRAID vdevs (NAS-140629, NAS-141277).
Pool creation validation blocked dedicated spares on dRAID pools. Both the web interface and the middleware validation now allow this configuration. - Adds spare activation for special and dedup vdevs (NAS-141201).
A failed device in a special or dedup vdev did not activate an available spare, which matters more as special vdevs come into wider use. Spares now activate for these vdev types. - Fixes the pool creation screen offering disks that SED encryption excludes (NAS-141096).
Disk selection during pool creation did not filter for SED encryption. The disk list now applies the filter. - Fixes the maximum data transfer size applied to 9500 TriMode devices (NAS-140978).
The driver did not apply the 2M limit that these devices report. An upstream fix is included so transfers stay within the supported size. - Fixes the storage screens showing a normal vdev status when a drive in that vdev is FAULTED (NAS-140955).
A faulted drive did not change the vdev status, so an administrator had to expand each vdev to find the problem. The vdev status now reflects a faulted drive, as it already did for an unavailable drive. - Fixes a false alert that an SMB share is unavailable because it uses a locked dataset (NAS-141461).
AShareLockedalert could persist after boot for a share on an encrypted dataset, even though the dataset was unlocked and the share worked normally. The alert now clears when the dataset unlocks during boot. - Fixes custom app updates and private registry support for authenticated Docker registries (NAS-141149, NAS-141553).
Custom app updates failed when the image came from a registry that requires authentication, and registries that usehtpasswdauthentication were not supported. Both authentication paths now work. - Fixes TrueCloud Backup errors that showed only
error.messageand jobs that could hang without end (NAS-141287).
The progress reader looked for a flaterror.messagefield, but restic nests the text inside anerrorobject, so every restic error turned into aKeyErrorand the real message never reached the user or the job log. Errors now report the text that restic returns. - Fixes a
dtypeerror that prevented pool selection for containers (NAS-141234).
Virtual machine and container device settings are stored encrypted. On a system restored from a configuration whose encryption secret no longer matched, these settings decrypted to empty values and failed validation, so the form returned onlydtypeand the containers feature stayed unusable. Devices that cannot be decrypted are now dropped when the encryption secret resets. - Fixes missing IPv6 connectivity in LXC containers on a clean install (NAS-141468).
A clean install of 26.0.0-BETA.2 enabled IPv4 forwarding but left IPv6 forwarding disabled on the host, so a container on the defaulttruenas0bridge received an IPv6 default route but could not reach IPv6 networks. IPv6 forwarding is now enabled. - Fixes WS-Discovery so the system appears in the Windows network browser (NAS-141440).
A system running 26.0.0-BETA.2 did not show up in network discovery, even with the same configuration that worked on 26.0.0-BETA.1. Discovery works again. - Fixes IPv6 autoconfiguration settings that did not apply after the
dhcpcdmigration (NAS-141208, NAS-141386).
An interface with Autoconfigure IPv6 disabled still received extra IPv6 default routes, and SLAAC stayed active on an interface with DHCP enabled. Both settings now apply as configured. - Fixes the Save button staying inactive when the device order changes in a virtual machine (NAS-140791).
A change to Device Order on a VM device did not activate Save, so the new order could not be applied on 26.0.0-BETA.1. The change now saves. - Fixes virtual machines left suspended after a periodic snapshot task (NAS-141124).
A VM with disks on a dataset covered by a periodic snapshot task could stay suspended without end, and it could only be resumed or powered off. These VMs now return to a running state. - Fixes certificate deletion blocked by TrueNAS Connect (NAS-141224).
Deleting a certificate could fail with a message that TrueNAS Connect uses it, even after the system was removed from TrueNAS Connect and the force option was used. A certificate that TrueNAS Connect no longer uses now deletes. - Fixes the time field on system audit events (NAS-141949).
Audit entries forsvc=SYSTEMevents recorded a time about seven hours behind UTC because the field used a fixed offset instead of the system time zone. Entries forsvc=MIDDLEWAREandsvc=SMBwere already correct. System audit entries now record the correct time. - Updates the NVIDIA GPU driver to 580.173.02, the current Long Term Support Branch (LTSB).
This version number is lower than the driver in 26-BETA.2, but it extends the support window for a more stable product. 26-BETA.2 shipped a 590 New Feature Branch driver, which is intended for early adopters and reaches end of life in December 2026. The 580 LTSB is supported until August 2028.
- Fixes crashes on systems that use Fibre Channel target mode (NAS-142014, NAS-142018).
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This release updates the Linux kernel and NVIDIA GPU driver to address security vulnerabilities and maintain driver support. It also fixes Fibre Channel crashes on Enterprise systems, an NFS server hang, false drive self-test alerts, deduplication table pruning errors, and directory services configuration changes.
- The Linux kernel was updated from v6.12.95 to v6.12.99, the latest 6.12 LTS release, pulling in fixes for more than 250 upstream CVEs !!!
- This release also moves the NVIDIA GPU driver to the 580 branch (v580.173.02)
Beyond the kernel and GPU driver, this release also fixes:
- Crashes when Fibre Channel target mode starts or stops on Enterprise systems
- An NFS server hang that could stop expiring clients after a brief network interruption — bad enough to require a reboot to clear
- False drive self-test failure alerts caused by TrueNAS reading the wrong SMART result
- Deduplication table (DDT) pruning errors that could misjudge entry age or overflow counters on very large tables
- A stuck Save button that blocked directory services configuration changes after upgrading from 25.04
- The ability to change the ALUA setting on Enterprise HA systems even when the standby controller is unreachable
- Failover speed on Enterprise HA systems, by moving a remote disk scan out of the critical failover path
- Audit entry parsing that could crash and restart the audit handler
Official Announcement: https://www.truenas.com/blog/truenas-25-10-6-truckload-security-vulnerabilities
https://forums.truenas.com/t/truenas-25-10-6-is-now-available/67423
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Updating my main production TrueNAS server from a nightly version to another nightly version …. Hope it goes well.
Post-update
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TrueNAS 25.10.5 brings an updated Linux kernel version 6.12.95, which patches multiple security-related CVEs, including SharedFrag (CVE-2026-43503) and PeditCOW (CVE-2026-46331) local privilege escalation vulnerabilities, as well as six more upstream security fixes.
Beyond the kernel, this release also delivers a number of TrueNAS specific fixes:
- A console memory leak was identified that could consume excess RAM
- Corrects several smartctl parsing errors that produced inaccurate drive SMART health reports
- Resolves an error that caused TrueCloud Backup jobs to hang indefinitely when an error occurred in the underlying restic software
- Tightens SSH key handling for replication and cloud credentials
- Obtains full RFC 5322 compliance for emails to ensure reliable delivery
- Improves the robustness of Enterprise HA for block storage
- And fixes a bug that blocked share ACL editing in certain edge cases
For full details on all of the updates, check out the TrueNAS 25.10 changelog on the TrueNAS Docs site.
https://www.truenas.com/blog/truenas-25-10-5-resolving-security-vulnerabilities
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Another uncomplicated upgrade!! The UI looks pretty !!
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Breaking Changes:
The REST API is removed in TrueNAS 26. Migrate all integrations to the WebSocket API before upgrading.26-BETA.2 Notable Changes
- Adds Forward Error Correction (FEC) mode as a configurable network interface setting on both Community Edition and Enterprise systems (NAS-139477, NAS-140329). Network interfaces that support FEC can now have the FEC mode configured directly from the interface settings in the UI.
- Adds the ability to view the reason for each system reboot on the local node (NAS-139412). TrueNAS now stores the cause of each reboot — for example, user-initiated, kernel panic, or scheduled update — so administrators can review reboot history when they investigate system events.
- Adds the missing
en_US.UTF-8locale to TrueNAS 26 (NAS-140692). The default English UTF-8 locale was not present in BETA.1, which could cause encoding errors for applications, scripts, and containers that depend on it. The locale is now available system-wide. - Improves visibility of important pool states such as resilvering in the web interface (NAS-139007). Pool states like resilvering, scrubbing, and degraded operations were not prominently displayed. The Storage dashboard and pool status screens now surface these states with clearer indicators so administrators can identify maintenance activity at a glance.
- Improves webshell access control with per-shell-type role checks and adds audit logging for shell sessions (NAS-141011). Webshell sessions for containers, VMs, and apps previously wrapped commands in
sudo -H -u <user>, which failed against root-owned libvirt and Docker sockets. Users with theFULL_ADMINrole but without unrestricted sudo encountered Polkit errors and broken shells. Webshell authorization now uses per-shell-type role checks (VM_WRITE,CONTAINER_WRITE,APPS_WRITE) alongside the existing webshell privilege, and shell sessions emitWEBSHELL_AUTHENTICATIONandWEBSHELL_LOGOUTaudit events. - Improves the built-in ACL preset templates by auto-including local and directory service user and admin groups (NAS-140530). When a built-in preset such as
NFS4_RESTRICTEDis applied through Use Preset, TrueNAS now adds entries forbuiltin_usersandbuiltin_administrators— and, on systems joined to Active Directory, the corresponding domain users and domain admins groups. The expanded ACL appears on screen before save so administrators can remove any entries they do not want. User-created templates are unaffected. - Improves the performance of directory listings on SMB shares from macOS clients (NAS-141125). When macOS Finder lists a directory with the AAPL extensions enabled, the previous code path added three syscalls per file entry to probe the AppleDouble resource fork size. The probe now reuses the directory enumeration’s existing file descriptor with a single syscall, reducing roughly two syscalls per file and producing noticeable listing speedups on directories with many entries.
- Fixes the Map User And Group IDs option on LXC containers not working (NAS-140766). A blocker bug prevented containers configured with user and group ID mapping from applying those mappings to the container filesystem. The mapping now applies correctly when the container starts.
- Fixes false failed a SMART selftest alerts that appeared after upgrading from TrueNAS 24.10 (Electric Eel) to 25.10 (Goldeye) or later (NAS-140652). Stale SMART data carried over during the upgrade triggered false-positive alerts on drives that had no actual SMART test failures. Affected systems no longer receive these alerts.
- Fixes a timeout in NVMe namespace delete operations on drives that contain written data (NAS-140748). The
disk_resizeoperation could hang or fail when it removed namespaces on NVMe drives with existing data. The delete operation now completes reliably regardless of the amount of data on the namespace. - Fixes an out-of-memory condition triggered by
posix_fadvise(POSIX_FADV_SEQUENTIAL)on ZFS datasets (NAS-140587). Applications that hinted sequential access on large files could cause the system to exhaust memory and trigger the OOM killer. The ZFS sequential prefetch path is updated so the hint no longer leads to runaway memory use. - Fixes the SMB service crash on Legacy Share types with the recycle bin feature enabled when Spotlight search is active (NAS-140749). The TrueNAS per-dataset recycle bin (vfs_recycle) keeps file handles open to prevent symlink race conditions, while the Spotlight metadata service relied on a share connection that skipped the normal file-close step during teardown. The mismatched shutdown order triggered an assertion failure and crashed the SMB service. The service shutdown order is corrected so the recycle bin and Spotlight can coexist.
- Fixes an issue where LXC containers from earlier TrueNAS versions could not start after upgrade to TrueNAS 26 (NAS-140691). The upgrade migration script did not properly mount container ZFS datasets, leaving the container filesystem intact but inaccessible and causing the init executable to appear missing. The migration script now mounts datasets correctly so containers start without manual intervention.
- Fixes GPU isolation and GPU passthrough to virtual machines after upgrade from earlier TrueNAS versions to 26 (NAS-140687). A regression in the upgrade script silently failed to apply required initramfs customizations for GPU device isolation, leaving the GPU in an unavailable state after the upgrade. Systems with a previously isolated GPU encountered a “device is not available” error when starting a VM with a passed-through GPU, or found that GPU isolation did not take effect. The upgrade script now applies the required customizations correctly so GPU isolation and passthrough work without manual recovery.
- Fixes the Send Feedback > Report a Bug feature failing to attach the debug file when Attach Debug is selected (NAS-140163, NAS-140237). The debug attachment could silently fail with no error in the UI, while ticket creation still succeeded without the debug file. The UI now uploads the debug file correctly and reports failures so users know when a manual attachment is needed.
- Fixes a regression in 26-BETA.1 that blocked virtual machine cloning (NAS-140792). Users could not clone existing VMs through the UI in BETA.1. VM cloning is restored in BETA.2.
- Fixes the GUI SSL Certificate field on System Settings > General > GUI Settings failing to save the selected certificate after upgrade from 25.10 to 26-BETA.1 (NAS-140354). The field displayed
Noneeven after a certificate was selected, and attempting to save other GUI settings produced a validation error stating the required certificate field was empty. The backend change in BETA.1 that returned the certificate as a numeric ID instead of a full object is now paired with aui_certificate_nameresponse field, so the UI can display and save the selected certificate correctly. - Fixes an error that blocked saving E-Mail options when GMail OAuth is selected (NAS-140306). Users configuring outbound email with GMail OAuth could not save the configuration. The save action now completes successfully.
- Fixes the inability to pass Intel GPU devices through to LXC containers (NAS-140421). Intel GPU devices did not appear in the device picker for LXC containers, preventing assignment. The full set of supported GPU devices, including Intel, now appears and can be assigned.
- Fixes the inability to add ISO files to virtual machines through the creation wizard or by manually adding a CDROM device (NAS-140446). ISO files could not be attached to VMs either at initial creation or by manually adding a CDROM device after creation. ISO attachment now works in both flows.
- Fixes a bug where NVMe namespace resize operations dropped the list of attached controllers (NAS-140497). When a namespace was resized, the original controller attachment configuration was discarded and had to be reconfigured manually. The namespace resize now preserves controller attachments.
- Fixes incorrect storage usage estimates on the Snapshots screen (NAS-140637). Storage usage values displayed on snapshot rows did not reflect actual consumption. Usage estimates now calculate and display correctly.
- Fixes a VM XML configuration error caused by duplicate USB controllers with the same index when a VM contains two or more USB devices (NAS-140626). Adding multiple USB devices to a VM produced a libvirt XML conflict that could prevent the VM from starting. USB device controllers now use unique indexes.
- Fixes several TrueSearch and macOS Spotlight integration issues on SMB and NFS shares (NAS-140952, NAS-141078, NAS-140932). TrueSearch from macOS Spotlight failed to return results on supported SMB shares, search activity could trigger NFS timeout issues on the same system, and the WebShare service did not toggle TrueSearch support correctly when reloaded with SIGHUP. All three issues are resolved.
- Fixes USB device passthrough to virtual machines (NAS-139548). A regression caused USB passthrough to fail on some VM configurations. USB passthrough now works reliably across supported devices.
- Fixes stale container entries that remained in the UI after the host pool was disconnected (NAS-140621). Container names continued to appear in the UI after the pool that hosted them was disconnected, even though the underlying containers were gone. The container list now refreshes to reflect the current pool state.
- Fixes middleware not propagating configuration changes to the kernel
nvmetsubsystem (NAS-140266). NVMe-over-Fabrics target configuration changes made through the UI did not always apply to the running kernel target. Middleware now reliably updatesnvmetwhen target settings change. - Fixes LXC containers reporting a generic hostname instead of the configured container name (NAS-140185). Containers reported their hostname as
LXCNAMEregardless of the name set in TrueNAS. The container hostname now matches the name shown in the UI. - Fixes an error that blocked edits to user accounts that belong to the
dockergroup (NAS-139955). Editing a user account that includeddockergroup membership returned an error and prevented saving. User edits now succeed regardless ofdockergroup membership. - Fixes the encryption dialog refusing to save when a validation error occurs on a hidden field (NAS-140293). Users could be blocked from saving the encryption configuration by a validation error on a field that was not visible in the current dialog state. The dialog now allows saving when hidden field errors do not apply.
- Fixes the Manual Update screen linking to a 404 page for the manual image installation guide (NAS-140366). The See the manual image installation guide link pointed at an outdated URL that no longer exists. The link now points to the correct documentation.
- Fixes Cloud Sync tasks targeting custom S3-compatible endpoints failing after the 25.10 upgrade (NAS-140383). A signing behavior change in 25.10 broke custom S3 backup destinations on non-AWS providers. Compatibility with non-AWS S3 providers is restored.
- Fixes dashboard widgets not rendering on some systems upgraded from 25.10.2 (NAS-139966). Dashboard widgets could fail to load after the upgrade because of stale widget configuration data. The widget configuration is migrated correctly so the dashboard renders without intervention.
- Fixes incorrect sort order on the Virtual Machines screen when sorting by the Running column (NAS-140501). Sorting VMs by running state did not group running and stopped VMs predictably. The sort now produces a consistent grouped order.
- Fixes the Alerts panel opening behind an active slide-in form (NAS-140108). When a configuration slide-in was open, clicking the alerts icon opened the alerts panel below the slide-in, where users could not see or interact with it. The alerts panel now opens above the slide-in.
- Removes a legacy USB boot detection workaround that could add a 15-second delay to system boot (NAS-140745). A workaround introduced in 2021 to address an early SCALE alpha boot-pool import race on USB boot disks injected
ZFS_INITRD_POST_MODPROBE_SLEEP=15into/etc/default/zfson systems where any boot-pool vdev appeared to be on a USB bus. USB boot is no longer a supported TrueNAS configuration, and the workaround is removed. Systems upgraded from a version that wrote the sleep line have it stripped automatically.
https://forums.truenas.com/t/truenas-26-0-0-beta-2-is-now-available/66483/33
