Incomplete cleanup in Linux kernel - CVE-2026-97566
Published: September 28, 2026
Vulnerability identifier: #VU152638
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97566
CWE-ID: CWE-459
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a kernel warning.
The vulnerability exists due to incomplete cleanup in the in-kernel MPTCP path manager's id 0 endpoint removal path when removing an id 0 endpoint while an ADD_ADDR announcement is pending. A local user can remove the id 0 endpoint while a pending ADD_ADDR announcement exists to trigger a kernel warning.
The warning is triggered when the path manager subsequently reselects id 0 after another signal endpoint is added.
Affected software
Linux kernel
How to mitigate CVE-2026-97566
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3