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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.

PUBLISHED Reserved 2026-03-09 | Published 2026-04-24 | Updated 2026-04-27 | Assigner Linux




HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Product status

Default status
unaffected

0f4b5f972216782a4acb1ae00dcb55173847c2ff (git) before 027145ace09fad4c7cbcd6c61fe9b429c63eb0e5
affected

0f4b5f972216782a4acb1ae00dcb55173847c2ff (git) before 18b7d09c2b794c71d4252f3ea2cf84ad12b73d6a
affected

0f4b5f972216782a4acb1ae00dcb55173847c2ff (git) before e2f78c7ec1655fedd945366151ba54fcb9580508
affected

0f4b5f972216782a4acb1ae00dcb55173847c2ff (git) before 19f94b39058681dec64a10ebeb6f23fe7fc3f77a
affected

Default status
affected

6.7
affected

Any version before 6.7
unaffected

6.12.80 (semver)
unaffected

6.18.21 (semver)
unaffected

6.19.11 (semver)
unaffected

7.0 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/027145ace09fad4c7cbcd6c61fe9b429c63eb0e5

git.kernel.org/...c/18b7d09c2b794c71d4252f3ea2cf84ad12b73d6a

git.kernel.org/...c/e2f78c7ec1655fedd945366151ba54fcb9580508

git.kernel.org/...c/19f94b39058681dec64a10ebeb6f23fe7fc3f77a

cve.org (CVE-2026-31554)

nvd.nist.gov (CVE-2026-31554)

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