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.
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.
Published:
2026-09-17
Score:
n/a
EPSS:
n/a
KEV:
No
Impact:
n/a
Action:
n/a
Analysis
No analysis available yet.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
|
||||||||||||
| Linux | Linux | affected |
|
No data.
No data.
No data available yet.
Remediation
No remediation available yet.
Tracking
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Advisories
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References
History
Thu, 17 Sep 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | ksmbd: safely discard unregistered deferred locks | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-09-17T16:06:48.393Z
Reserved: 2026-09-11T19:38:34.790Z
Link: CVE-2026-90156
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-17T17:17:08.717
Modified: 2026-09-17T17:17:08.717
Link: CVE-2026-90156
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses
No weakness.