Answer in brief
CVE-2026-90156 records a Unknown severity vulnerability in ksmbd: safely discard unregistered deferred locks. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <d09af9a35ff7b77a950b507133d9092aadbfeff4 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <054bcca4cd9f00719b01f7108b51a2168fb94f15 | d09af9a35ff7b77a950b507133d9092aadbfeff4, 054bcca4cd9f00719b01f7108b51a2168fb94f15 |
| Linux/Linuxgeneric | 5.15 | Not reported |
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d09af9a35ff7b77a950b507133d9092aadbfeff4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <054bcca4cd9f00719b01f7108b51a2168fb94f15 || >=0 <7.2.6 | d09af9a35ff7b77a950b507133d9092aadbfeff4, 054bcca4cd9f00719b01f7108b51a2168fb94f15, 7.2.6 |
| Linux/Linuxgeneric | >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <52b91bc5253bb83665f3ea70565d0b2487dae643 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <d09af9a35ff7b77a950b507133d9092aadbfeff4 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <054bcca4cd9f00719b01f7108b51a2168fb94f15 | 52b91bc5253bb83665f3ea70565d0b2487dae643, d09af9a35ff7b77a950b507133d9092aadbfeff4, 054bcca4cd9f00719b01f7108b51a2168fb94f15 |
| Linux/Linuxgeneric | >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <ecdcfa15b3d799476c685cecd433ebefc93015c8 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <77413400f083a959724de6f36348c9677ef9873a || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <52b91bc5253bb83665f3ea70565d0b2487dae643 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <d09af9a35ff7b77a950b507133d9092aadbfeff4 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <054bcca4cd9f00719b01f7108b51a2168fb94f15 | ecdcfa15b3d799476c685cecd433ebefc93015c8, 77413400f083a959724de6f36348c9677ef9873a, 52b91bc5253bb83665f3ea70565d0b2487dae643, d09af9a35ff7b77a950b507133d9092aadbfeff4, 054bcca4cd9f00719b01f7108b51a2168fb94f15 |
| Linux/Linuxgeneric | >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <aaa51ac0d934cb4e2ab96e150fccc934e822009b || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <ecdcfa15b3d799476c685cecd433ebefc93015c8 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <77413400f083a959724de6f36348c9677ef9873a || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <52b91bc5253bb83665f3ea70565d0b2487dae643 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <d09af9a35ff7b77a950b507133d9092aadbfeff4 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <054bcca4cd9f00719b01f7108b51a2168fb94f15 | aaa51ac0d934cb4e2ab96e150fccc934e822009b, ecdcfa15b3d799476c685cecd433ebefc93015c8, 77413400f083a959724de6f36348c9677ef9873a, 52b91bc5253bb83665f3ea70565d0b2487dae643, d09af9a35ff7b77a950b507133d9092aadbfeff4, 054bcca4cd9f00719b01f7108b51a2168fb94f15 |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
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.
Quoted source text, attributed separately from HOL analysis.