Race condition in Linux kernel - CVE-2026-63879
Published: July 20, 2026
Vulnerability identifier: #VU138779
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-63879
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2026-63879
Install security update from vendor's repository.