SB20260905174 - Race condition in Linux kernel futex

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-80777)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to trigger a race condition.

The vulnerability exists due to a race condition in private priority-inheritance futex handling during exec() when a task executes exec() after robust-list cleanup and before switching to a new memory map. A local user can execute a program that uses private priority-inheritance futexes to trigger a race condition.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0478bc6bf197629fea0331d65b39eeea043c6cf0
• https://git.kernel.org/stable/c/c5f0bc9fd1cec4a00400cc727fcde03e0fde17cc
• https://git.kernel.org/stable/c/d7944cee62ec6cca1c90780a766960a57d3b4bb8
• https://git.kernel.org/stable/c/fdf538b2e69653ff740e84042245018e5680cd7b