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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < aaa51ac0d934cb4e2ab96e150fccc934e822009b; >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < ecdcfa15b3d799476c685cecd433ebefc93015c8; >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 77413400f083a959724de6f36348c9677ef9873a; >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 52b91bc5253bb83665f3ea70565d0b2487dae643; >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < d09af9a35ff7b77a950b507133d9092aadbfeff4; >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 054bcca4cd9f00719b01f7108b51a2168fb94f15 |
| Linux | Linux | 5.15 |
References
- https://git.kernel.org/stable/c/054bcca4cd9f00719b01f7108b51a2168fb94f15
- https://git.kernel.org/stable/c/52b91bc5253bb83665f3ea70565d0b2487dae643
- https://git.kernel.org/stable/c/77413400f083a959724de6f36348c9677ef9873a
- https://git.kernel.org/stable/c/aaa51ac0d934cb4e2ab96e150fccc934e822009b
- https://git.kernel.org/stable/c/d09af9a35ff7b77a950b507133d9092aadbfeff4
- https://git.kernel.org/stable/c/ecdcfa15b3d799476c685cecd433ebefc93015c8
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 30, 2026
- NVD status
- Received