CVE-2026-31455
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/239d734c00644072862fa833805c4471573b1445Patch
- https://git.kernel.org/stable/c/4f24a767e3d64a5f58c595b5c29b6063a201f1e3Patch
- https://git.kernel.org/stable/c/558e3275d8a3b101be18a7fe7d1634053e9d9b07Patch
- https://git.kernel.org/stable/c/8147e304d7d32fd5c3e943babc296ce2873dc279Patch
- https://git.kernel.org/stable/c/a89434a6188d8430ea31120da96e3e4cefb58686Patch
- https://git.kernel.org/stable/c/bda27fc0b4eb3a425d9a18475c4cb94fbe862c60Patch
- https://git.kernel.org/stable/c/d38135af04a3ad8a585c899d176efc8e97853115Patch
- https://git.kernel.org/stable/c/e6cc490048f78b009259a5f032acead9f789c34cPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.