Use-after-free in Linux kernel - CVE-2026-80926
Published: September 13, 2026
Vulnerability identifier: #VU149464
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80926
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to trigger a use-after-free.
The vulnerability exists due to use-after-free in the ksmbd oplock break notification path when processing an oplock break concurrently with durable-handle connection teardown. A remote user can hold a durable batch oplock and trigger an oplock break during connection teardown to trigger a use-after-free.
Affected software
Linux kernel
How to mitigate CVE-2026-80926
Install security update from vendor's repository.