Riskcovery

CVE-2026-31554

futex: Require sys_futex_requeue() to have identical flags

State
Published
Severity
7.8 High
Published
Apr 24, 2026
Updated
Oct 19, 2026
Reserved
Mar 9, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

futex: Require sys_futex_requeue() to have identical flags

Nicholas reported that his LLM found it was possible to create a UaF when sys_futex_requeue() is used with different flags. The initial motivation for allowing different flags was the variable sized futex, but since that hasn't been merged (yet), simply mandate the flags are identical, as is the case for the old style sys_futex() requeue operations.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • 0f4b5f972216782a4acb1ae00dcb55173847c2ff to before 027145ace09fad4c7cbcd6c61fe9b429c63eb0e5Affected
  • 0f4b5f972216782a4acb1ae00dcb55173847c2ff to before 18b7d09c2b794c71d4252f3ea2cf84ad12b73d6aAffected
  • 0f4b5f972216782a4acb1ae00dcb55173847c2ff to before e2f78c7ec1655fedd945366151ba54fcb9580508Affected
  • 0f4b5f972216782a4acb1ae00dcb55173847c2ff to before 19f94b39058681dec64a10ebeb6f23fe7fc3f77aAffected
LinuxLinux
  • 6.7Affected
  • before 6.7Not affected
  • 6.12.80 through 6.12.*Not affected
  • 6.18.21 through 6.18.*Not affected
  • 6.19.11 through 6.19.*Not affected
  • 7.0 and laterNot affected

References

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