SB20260815203 - Race condition in Linux kernel cxl driver

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-74272)

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

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper synchronization in the cxl region deletion logic when handling sysfs requests and root device teardown. A local user can trigger concurrent region deletion operations to cause a denial of service.

The issue involves races between sysfs-triggered region deletion, multiple deletion paths, and kernel teardown of the CXL root device.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/4dd86ca99ffcc413cbf79063fd9956ef54e0ca91
• https://git.kernel.org/stable/c/be44c1c04f85d7b7ac1c597a30b443bbd346acbd