Improper resource shutdown or release in Linux kernel - CVE-2026-80934

Vulnerability identifier: #VU149460

CSH Severity: Low

CVSS v4: 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]

CVE-ID: CVE-2026-80934

CWE-ID: CWE-404

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

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.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17

• https://git.kernel.org/stable/c/01f2e0da8548f82d704b65b513026cfedc5f8962
• https://git.kernel.org/stable/c/b754d3a6d44c53d9853eba374d8a7ef279a9d00a
• https://git.kernel.org/stable/c/deaa2e3656937fbbe312f0ee2616c756c6e2511f

• Improper resource shutdown or release in Linux kernel mt76 mt7996 driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more