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Vulnerability record · CVE-2026-31453 · published 22 April 2026

CVE-2026-31453: Linux kernel null pointer dereference vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: xfs: avoid dereferencing log items after push callbacks After xfsaild_push_item() calls iop_push(), the log item may have been freed if the AIL lock was dropped during the push. Background inode reclaim or the dquot shrinker can free the log item while the AIL lock is not held, and the tracepoints in the switch statement dereference the log item after iop_push() returns. Fix this by capturing the log item type, flags, and LSN before calling xfsaild_push_item(), and introducing a new xfs_ail_push_class trace event class that takes these pre-captured values and the ailp pointer instead of the log item pointer.

7.8 CVSS 3.1 High EPSS 0.18% · top 93.6% CWE-476 · NULL pointer dereference
7.8CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: xfs: avoid dereferencing log items after push callbacks After xfsaild_push_item() calls iop_push(), the log item may have been freed if the AIL lock was dropped during the push. Background inode reclaim or the dquot shrinker can free the log item while the AIL lock is not held, and the tracepoints in the switch statement dereference the log item after iop_push() returns. Fix this by capturing the log item type, flags, and LSN before calling xfsaild_push_item(), and introducing a new xfs_ail_push_class trace event class that takes these pre-captured values and the ailp pointer instead of the log item pointer.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/451c6329d9afa45862c36fe6677eb7750db60617 Patch
https://git.kernel.org/stable/c/7121b22b0bac89394cc4c6a54b5aebc15347bdf5 Patch
https://git.kernel.org/stable/c/79ef34ec0554ec04bdbafafbc9836423734e1bd6 Patch
https://git.kernel.org/stable/c/95fb5d643cc70959baa54cd17f52f80ffc3295e7 Patch
https://git.kernel.org/stable/c/c4d603e8e58a3bf35480135ccca2b4f7238abda5 Patch
https://git.kernel.org/stable/c/c8a2ab339b88d10fc34a3318c92f07d8a467019d Patch

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Source: NIST National Vulnerability Database (record CVE-2026-31453), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.