Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: safely discard unregistered deferred locks When vfs_lock_file() defers a lock, smb2_lock() puts its ksmbd_lock on rollback_list before allocating and registering the asynchronous work. If either operation fails, rollback assumes that smb_lock->conn is initialized and dereferences NULL. The deferred file_lock also remains linked into the VFS blocked-lock state while it is freed. Keep the lock off rollback_list until async setup succeeds. On setup failures, explicitly unblock and wake the deferred lock before freeing it and its ksmbd wrapper.
References
- https://git.kernel.org/stable/c/054bcca4cd9f00719b01f7108b51a2168fb94f15
- https://git.kernel.org/stable/c/d09af9a35ff7b77a950b507133d9092aadbfeff4
FAQ
What is CVE-2026-90156?
CVE-2026-90156 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: ksmbd: safely discard unregistered deferred locks When vfs_lock_file() defers a lock, smb2_lock() puts its ksmbd_lock on rollback_...
How severe is CVE-2026-90156?
CVSS scoring is not yet available for CVE-2026-90156. Check NVD for updates.
Is there a patch for CVE-2026-90156?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.