Off-by-one in Linux kernel - CVE-2026-90289
Published: September 18, 2026
Vulnerability identifier: #VU151200
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90289
CWE-ID: CWE-193
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause an out-of-bounds memory access.
The vulnerability exists due to an off-by-one error in the AMDGPU display manager HDCP per-connector arrays when handling a 32nd display connector. A local user can cause the HDCP code to process a 32nd connector to cause an out-of-bounds memory access.
Affected software
Linux kernel
How to mitigate CVE-2026-90289
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3