Out-of-bounds read in Linux kernel - CVE-2026-89819
Published: September 17, 2026
Vulnerability identifier: #VU150465
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89819
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service or disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in the AMD display plane degamma LUT handling when processing a malformed AMD_PLANE_DEGAMMA_LUT property blob. A local user can set a malformed plane degamma LUT to cause a denial of service or disclose sensitive information.
The AMD_PLANE_DEGAMMA_LUT property is exposed only in builds with AMD_PRIVATE_COLOR defined.
Affected software
Linux kernel
How to mitigate CVE-2026-89819
Install security update from vendor's repository.