CVE-2026-31554
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedApr 24, 2026
First seenApr 24, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- linux linux_kernel6.12.80, 6.18.21, 6.19.11 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.7.1 ≤ v < 6.12.80, 6.13 ≤ v < 6.18.21, 6.19 ≤ v < 6.19.11, 6.7, 7.0 | 6.12.80, 6.18.21, 6.19.11 |
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