Incomplete Internal State Distinction in Linux kernel - CVE-2026-80989
Published: September 12, 2026
Vulnerability identifier: #VU149407
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80989
CWE-ID: CWE-372
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper connection state management in tbnet_connected_work() when handling a failed connection setup followed by connection teardown. A remote attacker can trigger a failed connection setup followed by connection teardown to cause a denial of service.
When panic_on_warn is enabled, stopping already stopped rings can be fatal.
Affected software
Linux kernel
How to mitigate CVE-2026-80989
Install security update from vendor's repository.