Memory corruption in Linux kernel - CVE-2026-80736
Published: September 4, 2026
Vulnerability identifier: #VU146928
CSH Severity: Low
CVSS v4: 2.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80736
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an attacker with physical access to cause incorrect DisplayPort bandwidth reservation accounting.
The vulnerability exists due to an out-of-bounds array access in tb_consumed_dp_bandwidth() when processing a bandwidth group with ID MAX_GROUPS. An attacker with physical access can trigger processing of the maximum valid group ID to cause incorrect DisplayPort bandwidth reservation accounting.
Group ID 0 is reserved, while valid group IDs range from 1 through MAX_GROUPS.
Affected software
Linux kernel
How to mitigate CVE-2026-80736
Install security update from vendor's repository.