Heap-based buffer overflow in Linux kernel - CVE-2026-31690
Published: April 27, 2026
Vulnerability identifier: #VU128247
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-31690
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a buffer overflow in the TH1520 AON firmware protocol driver when processing firmware protocol data. A local user can trigger the vulnerable code path to cause a denial of service.
The issue was identified in access to the 'mode' field through the 'resource' pointer using an offset.
Affected software
Linux kernel
How to mitigate CVE-2026-31690
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3