CVE-2026-31455
Description
In the Linux kernel, the following vulnerability has been resolved: xfs: stop reclaim before pushing AIL during unmount The unmount sequence in xfs_unmount_flush_inodes() pushed the AIL while background reclaim and inodegc are still running. This is broken independently of any use-after-free issues - background reclaim and inodegc should not be running while the AIL is being pushed during unmount, as inodegc can dirty and insert inodes into the AIL during the flush, and background reclaim can race to abort and free dirty inodes. Reorder xfs_unmount_flush_inodes() to stop inodegc and cancel background reclaim before pushing the AIL. Stop inodegc before cancelling m_reclaim_work because the inodegc worker can re-queue m_reclaim_work via xfs_inodegc_set_reclaimable.
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
Linux kernel Affected 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 7.0 | Affected | — |
| — | Affected | 5.10.253 |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 6.12.85-1 |
| sid | Fixed | 6.19.11-1 |
| forky | Fixed | 6.19.11-1 |
| bullseye | Fixed | 6.1.170-1~deb11u1 |
| bookworm | Fixed | 6.1.170-1 |
References
- https://git.kernel.org/stable/c/239d734c00644072862fa833805c4471573b1445
- https://git.kernel.org/stable/c/4f24a767e3d64a5f58c595b5c29b6063a201f1e3
- https://git.kernel.org/stable/c/558e3275d8a3b101be18a7fe7d1634053e9d9b07
- https://git.kernel.org/stable/c/8147e304d7d32fd5c3e943babc296ce2873dc279
- https://git.kernel.org/stable/c/a89434a6188d8430ea31120da96e3e4cefb58686
- https://git.kernel.org/stable/c/bda27fc0b4eb3a425d9a18475c4cb94fbe862c60
- https://git.kernel.org/stable/c/d38135af04a3ad8a585c899d176efc8e97853115
- https://git.kernel.org/stable/c/e6cc490048f78b009259a5f032acead9f789c34c
- https://www.suse.com/security/cve/CVE-2026-31455.html
- https://security-tracker.debian.org/tracker/CVE-2026-31455
CWEs
CWE-416
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.