CVE-2026-31554
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.17% probability · 7th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/027145ace09fad4c7cbcd6c61fe9b429c63eb0e5Patch
- https://git.kernel.org/stable/c/18b7d09c2b794c71d4252f3ea2cf84ad12b73d6aPatch
- https://git.kernel.org/stable/c/19f94b39058681dec64a10ebeb6f23fe7fc3f77aPatch
- https://git.kernel.org/stable/c/e2f78c7ec1655fedd945366151ba54fcb9580508Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.