CVE-2026-53168
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.
Does this matter?
Lower severity and a low EPSS score (0.16%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.16% probability · 6th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/12df4cfa738aefff21756728e91056d7defb0fe6Patch
- https://git.kernel.org/stable/c/15487f98863dc7156ed43c5be26d478beb82ba35Patch
- https://git.kernel.org/stable/c/99c317d7f8b7bbf3de16d20a01f363e390114ceaPatch
- https://git.kernel.org/stable/c/9c954499d43aefac01c5dfb57a82b13d2dcf4b94Patch
- https://git.kernel.org/stable/c/9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6Patch
- https://git.kernel.org/stable/c/bd23fa0c16c5c86e5b7713224ffbb87d9db81ccaPatch
- https://git.kernel.org/stable/c/dd92773d4d9cea010474eb08a5133c14ff6ab53aPatch
- https://git.kernel.org/stable/c/e692f0cb86204dcdb9dddc0b355407eda6394a67Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.