SB20260720398 - Race condition in Linux kernel amd amdgpu driver

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-63879)

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 amdgpu_hmm_range_get_pages in the AMDGPU HMM handling code when reading the notifier sequence across range processing. A local user can trigger memory invalidation during page range handling to cause a denial of service.

The issue can result in operations being performed on invalid pages.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2fd24407457a6b181ba827705678da70e528dcd0
• https://git.kernel.org/stable/c/962d684b5dc0741dcd93485d41b450de402d5592