SB20260427194 - Heap-based buffer overflow in Linux kernel firmware thead
Published: April 27, 2026
Security Bulletin ID
SB20260427194
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Heap-based buffer overflow (CVE-ID: CVE-2026-31690)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: 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
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.
Remediation
Install update from vendor's website.