SB20260918325 - Out-of-bounds read in Linux kernel mediatek mt76 driver
Published: September 18, 2026
Security Bulletin ID
SB20260918325
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-90350)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to perform an out-of-bounds read.
The vulnerability exists due to an out-of-bounds read in mt76_vif_link() when processing an out-of-range link ID. A local user can cause processing of an out-of-range link ID to perform an out-of-bounds read.
The issue occurs before the first link has been added, when the default link ID is IEEE80211_LINK_UNSPECIFIED (0xf).
Remediation
Install update from vendor's website.