SB2026092835 - Out-of-bounds write in Linux kernel mt76 mt7921 driver
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB2026092835
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-98159)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause memory corruption.
The vulnerability exists due to improper bounds checking in the mt7921_load_clc CLC firmware record loader when processing a malformed CLC firmware image. A local user can provide a malformed CLC firmware image to cause memory corruption.
Remediation
Install update from vendor's website.