CVE-2026-31455 Details
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.
A vulnerability in the Linux kernel's XFS filesystem has been addressed, which involved an improper unmount sequence that could lead to issues. During the unmount process, the AIL (Asynchronous I/O Log) was pushed while background reclaim and inode garbage collection were still active. This could cause a race condition where the background processes interfered with the unmounting, potentially leading to use-after-free issues. The vulnerability has been fixed by reordering the unmount process to halt the background reclaim and inode garbage collection before pushing the AIL, ensuring a smoother and safer unmount sequence.
Users can update to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for updating the kernel can be found in the official Linux kernel documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/239d734c00644072862fa833805c4471573b1445 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4f24a767e3d64a5f58c595b5c29b6063a201f1e3 | kernel.org | Patch |
| https://git.kernel.org/stable/c/558e3275d8a3b101be18a7fe7d1634053e9d9b07 | kernel.org | Patch |
| https://git.kernel.org/stable/c/8147e304d7d32fd5c3e943babc296ce2873dc279 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a89434a6188d8430ea31120da96e3e4cefb58686 | kernel.org | Patch |
| https://git.kernel.org/stable/c/bda27fc0b4eb3a425d9a18475c4cb94fbe862c60 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d38135af04a3ad8a585c899d176efc8e97853115 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e6cc490048f78b009259a5f032acead9f789c34c | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.9, < 5.10.253 >= 5.11, < 5.15.203 >= 5.16, < 6.1.168 >= 6.2, < 6.6.131 >= 6.7, < 6.12.80 >= 6.13, < 6.18.21 >= 6.19, < 6.19.11 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 7.0 rc5 7.0 rc7 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 5, 2026 | Reanalysis | [email protected] |
| Jun 5, 2026 | Reanalysis | [email protected] |
| May 5, 2026 | Initial Analysis | [email protected] |
| Apr 22, 2026 | New CVE Received | kernel.org |