SB20260918311 - Use-after-free in Linux kernel mt76 mt7915 driver
Published: September 18, 2026
Security Bulletin ID
SB20260918311
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) Use-after-free (CVE-ID: CVE-2026-90368)
CWE-ID: CWE-416 - Use After Free
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 dereference a stale monitor_vif pointer.
The vulnerability exists due to use-after-free in mt7915_add_interface() when mt76_wcid_alloc() fails during interface addition. A local user can trigger a failed interface addition to dereference a stale monitor_vif pointer.
mac80211 does not call remove_interface() when interface addition fails.
Remediation
Install update from vendor's website.