Improper access control in Linux kernel - CVE-2026-63848
Published: July 20, 2026
Vulnerability identifier: #VU138808
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-2026-63848
CWE-ID: CWE-284
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 access control in the amdgpu JPEG v2.0 ring when processing command submission requests with user fences. A local user can submit a command stream with a user fence to cause a denial of service.
How to mitigate CVE-2026-63848
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/2e216c2ff159b2eb1da6e9c716d727efc73c64b5
- https://git.kernel.org/stable/c/41c4f3f68a343d62bd352a95ace93a11c4ad92ed
- https://git.kernel.org/stable/c/b41248d1c18384835f6532e68592ee07605da283
- https://git.kernel.org/stable/c/e5f612dc91650561fe2b5b76dd6d2898ec9ad480
- https://git.kernel.org/stable/c/f675801889b265634aefd30aa4503fc2b9e6ce1c