CVE-2026-23261
Description
In the Linux kernel, the following vulnerability has been resolved: nvme-fc: release admin tagset if init fails nvme_fabrics creates an NVMe/FC controller in following path: nvmf_dev_write() -> nvmf_create_ctrl() -> nvme_fc_create_ctrl() -> nvme_fc_init_ctrl() nvme_fc_init_ctrl() allocates the admin blk-mq resources right after nvme_add_ctrl() succeeds. If any of the subsequent steps fail (changing the controller state, scheduling connect work, etc.), we jump to the fail_ctrl path, which tears down the controller references but never frees the admin queue/tag set. The leaked blk-mq allocations match the kmemleak report seen during blktests nvme/fc. Check ctrl->ctrl.admin_tagset in the fail_ctrl path and call nvme_remove_admin_tag_set() when it is set so that all admin queue allocations are reclaimed whenever controller setup aborts.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 6.18.10-1 |
| debian | sid | fixed | 6.18.10-1 |
| debian | trixie | fixed | 6.12.73-1 |
| linux-kernel | affected | 6.6.124 | |
| linux-kernel | 6.18 | affected | |
| linux-kernel | 6.19 | affected | |
References
- https://git.kernel.org/stable/c/7c54d3f5ebbc5982daaa004260242dc07ac943ea
- https://git.kernel.org/stable/c/d1877cc7270302081a315a81a0ee8331f19f95c8
- https://git.kernel.org/stable/c/e810b290922c535feb34bc90ab549446fe94d2a3
- https://git.kernel.org/stable/c/fa301aef50e3f3b5be6ee53457608beae5aa7a01
- https://www.suse.com/security/cve/CVE-2026-23261.html
- https://security-tracker.debian.org/tracker/CVE-2026-23261
CWEs
CWE-401
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.