SB2026091326 - Improper resource shutdown or release in Linux kernel mt76 mt7996 driver
Published: September 13, 2026
Security Bulletin ID
SB2026091326
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper resource shutdown or release (CVE-ID: CVE-2026-80934)
CWE-ID: CWE-404 - Improper Resource Shutdown or Release
CVSSv4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper resource release in the mt7996 TXP skb unmap handling for AddBA request frames when processing AddBA request action frames. A remote attacker can repeatedly initiate associations to cause a denial of service.
The issue manifests under continuous client reconnect churn when WED is enabled.
Remediation
Install update from vendor's website.