Security Advisory

Linux Kernel Security Update Advisory

  • Sep 09 2026
Linux Kernel Security Update Advisory

Overview

A security update has been released to address CVE-2026-31554, a vulnerability discovered in the Linux kernel. This vulnerability is a “use-after-free” vulnerability that occurs in the sysfutexrequeue() function of the futex (fast user-space mutex) component when different flags are used together.

Affected Systems

  • Linux Kernel versions 6.7 Through 6.12.80.
  • Linux Kernel versions 6.7 Through 6.18.21.
  • Linux Kernel versions 6.7 Through 6.19.11.
  • Linux Kernel versions 6.7 Through 7.0.

Resolution

A Vulnerability Patch for this vulnerability has been released via the latest update. The vulnerability has been fixed in the following versions and later:

  • Linux Kernel version 6.12.80 And later.
  • Linux Kernel version 6.18.21 Or later.
  • Linux Kernel version 6.19.11 Or later.
  • Linux Kernel version 7.0 Or later.

Note

The reference site describes CVE-2026-31554 as “futex: Require sysfutexrequeue() to have identical flags.”

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