PT-2026-34359 · Linux · Linux Kernel

Published 2026-04-22 · Updated 2026-04-23 · CVE-2026-31454

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A use-after-free issue exists in the XFS file system. In the functions xfs inode item push() and xfs qm dquot logitem push(), the AIL lock is released to perform buffer IO. This allows the log item to be freed by the dquot shrinker or background reclaim once the cluster buffer no longer protects it. A subsequent spin lock() call then dereferences lip->li ailp, leading to the memory corruption.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-31454

ECHO-CDB9-239F-B146

Affected Products

Linux Kernel

References · 18

• https://ubuntu.com/security/CVE-2026-31454 · Vendor Advisory
• https://git.kernel.org/stable/c/edd1637d4e3911ab6c760f553f2040fe72f61a13 · Patch
• https://git.kernel.org/stable/c/6dbe17f19c290a72ce57d5abc70e1fad0c3e14e5 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31454 · Security Note
• https://git.kernel.org/stable/c/75669e987137f49c99ca44406bf0200d1892dd16 · Patch
• https://cve.org/CVERecord?id=CVE-2026-31454 · Security Note
• https://git.kernel.org/stable/c/d8fc60bbaf5aea1604bf9f4ed565da6a1ac7a87d · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-31454 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31454 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31454 · Vendor Advisory
• https://git.kernel.org/stable/c/19437e4f7bb909afde832b39372aa2f3ce3cfd88 · Patch
• https://git.kernel.org/stable/c/4c7d50147316cf049462f327c4a3e9dc2b7f1dd0 · Patch
• https://git.kernel.org/stable/c/50f5f056807b7bed74f4f307f2ca0ed92f3e556d · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31454 · Vendor Advisory
• https://git.kernel.org/stable/c/394d70b86fae9fe865e7e6d9540b7696f73aa9b6 · Patch