Answer in brief
CVE-2026-53168 records a Medium severity (CVSS 5.5) vulnerability in fuse: reject fuse_notify() pagecache ops on directories. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (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 5.5. 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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 <15487f98863dc7156ed43c5be26d478beb82ba35 || >=5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 <bd23fa0c16c5c86e5b7713224ffbb87d9db81cca || >=5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 <9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6 || >=5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 <dd92773d4d9cea010474eb08a5133c14ff6ab53a || >=5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 <99c317d7f8b7bbf3de16d20a01f363e390114cea || >=5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 <12df4cfa738aefff21756728e91056d7defb0fe6 || >=5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 <e692f0cb86204dcdb9dddc0b355407eda6394a67 || >=5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 <9c954499d43aefac01c5dfb57a82b13d2dcf4b94 | 15487f98863dc7156ed43c5be26d478beb82ba35, bd23fa0c16c5c86e5b7713224ffbb87d9db81cca, 9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6, dd92773d4d9cea010474eb08a5133c14ff6ab53a, 99c317d7f8b7bbf3de16d20a01f363e390114cea, 12df4cfa738aefff21756728e91056d7defb0fe6, e692f0cb86204dcdb9dddc0b355407eda6394a67, 9c954499d43aefac01c5dfb57a82b13d2dcf4b94 |
| Linux/Linuxgeneric | 4.20 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
In the Linux kernel, the following vulnerability has been resolved: fuse: reject fuse_notify() pagecache ops on directories The operations FUSE_NOTIFY_STORE and FUSE_NOTIFY_RETRIEVE allow the FUSE daemon to actively write/read pagecache contents. For directories with FOPEN_CACHE_DIR, the pagecache is used as kernel-internal cache storage, and userspace is not supposed to have direct access to this cache - in particular, fuse_parse_cache() will hit WARN_ON() if the cache contains bogus data. Reject FUSE_NOTIFY_STORE and FUSE_NOTIFY_RETRIEVE on anything other than regular files with -EINVAL.
Quoted source text, attributed separately from HOL analysis.