PT-2026-52264 · Linux · Linux

Published 2026-06-25 · Updated 2026-06-25 · CVE-2026-53168

NVD

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.

Related Identifiers

CVE-2026-53168

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-53168 · Security Note
• https://git.kernel.org/stable/c/bd23fa0c16c5c86e5b7713224ffbb87d9db81cca · Note
• https://git.kernel.org/stable/c/12df4cfa738aefff21756728e91056d7defb0fe6 · Note
• https://git.kernel.org/stable/c/99c317d7f8b7bbf3de16d20a01f363e390114cea · Note
• https://git.kernel.org/stable/c/dd92773d4d9cea010474eb08a5133c14ff6ab53a · Note
• https://git.kernel.org/stable/c/9c954499d43aefac01c5dfb57a82b13d2dcf4b94 · Note
• https://git.kernel.org/stable/c/9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6 · Note
• https://git.kernel.org/stable/c/15487f98863dc7156ed43c5be26d478beb82ba35 · Note
• https://git.kernel.org/stable/c/e692f0cb86204dcdb9dddc0b355407eda6394a67 · Note