Answer in brief
CVE-2026-74522 records a High severity (CVSS 8.8) vulnerability in ksmbd: fix use-after-free in __close_file_table_ids(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8510a043d334ecdf83d4604782f288db6bf21d60 <67aaec2a1fdce3e1dde46c45b5d1ef8cf22f65cd || >=8510a043d334ecdf83d4604782f288db6bf21d60 <0c3918c2cee62ec6c9de8d5c73ebfe6f833961ac || >=8510a043d334ecdf83d4604782f288db6bf21d60 <9be4a66f019ea90bd9deca70511f4f9ffebf5c6f || >=8510a043d334ecdf83d4604782f288db6bf21d60 <cffbdc86393b0235383a20c8c59bc32f16036459 || >=8510a043d334ecdf83d4604782f288db6bf21d60 <e7188199eff46a636f3436356f0aae039be6dd66 || df30cbfd3d8a70e61ce59f63ce5ed2261799ac10 || aaf1d5ebb358f546414965b39da90107a7ca7ce5 || >=5.15.38 <5.16 || >=5.17.6 <5.18 | 67aaec2a1fdce3e1dde46c45b5d1ef8cf22f65cd, 0c3918c2cee62ec6c9de8d5c73ebfe6f833961ac, 9be4a66f019ea90bd9deca70511f4f9ffebf5c6f, cffbdc86393b0235383a20c8c59bc32f16036459, e7188199eff46a636f3436356f0aae039be6dd66, 5.16, 5.18 |
| Linux/Linuxgeneric | 5.18 | Not reported |
| Linux/Linuxgeneric | >=8510a043d334ecdf83d4604782f288db6bf21d60 <19bfd90d5aaf63217735d81964585c5306158e5f || >=8510a043d334ecdf83d4604782f288db6bf21d60 <67aaec2a1fdce3e1dde46c45b5d1ef8cf22f65cd || >=8510a043d334ecdf83d4604782f288db6bf21d60 <0c3918c2cee62ec6c9de8d5c73ebfe6f833961ac || >=8510a043d334ecdf83d4604782f288db6bf21d60 <9be4a66f019ea90bd9deca70511f4f9ffebf5c6f || >=8510a043d334ecdf83d4604782f288db6bf21d60 <cffbdc86393b0235383a20c8c59bc32f16036459 || >=8510a043d334ecdf83d4604782f288db6bf21d60 <e7188199eff46a636f3436356f0aae039be6dd66 || df30cbfd3d8a70e61ce59f63ce5ed2261799ac10 || aaf1d5ebb358f546414965b39da90107a7ca7ce5 || >=5.15.38 <5.16 || >=5.17.6 <5.18 | 19bfd90d5aaf63217735d81964585c5306158e5f, 67aaec2a1fdce3e1dde46c45b5d1ef8cf22f65cd, 0c3918c2cee62ec6c9de8d5c73ebfe6f833961ac, 9be4a66f019ea90bd9deca70511f4f9ffebf5c6f, cffbdc86393b0235383a20c8c59bc32f16036459, e7188199eff46a636f3436356f0aae039be6dd66, 5.16, 5.18 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in __close_file_table_ids() A ksmbd_file can remain alive after logical close while another session holds a temporary reference obtained through ksmbd_lookup_fd_inode(). ksmbd_close_fd() currently marks the file closed and drops the idr-owned reference, but leaves the pointer published in the closing session's idr until the final reference is dropped. If the foreign holder performs the final ksmbd_fd_put(), __put_fd_final() supplies the foreign session's file table to __ksmbd_close_fd(). The object is then freed without being removed from its owner's idr, and the owner session later dereferences the stale pointer during file-table teardown. Remove the volatile id from the owner's idr while ksmbd_close_fd() still holds that table's lock, and clear volatile_id before dropping the idr-owned reference. A later foreign final put then only performs physical destruction and cannot remove the object from the wrong table.
Quoted source text, attributed separately from HOL analysis.