Medium 5.5Published Jun 25, 2026

CVE-2026-53168fuse: reject fuse_notify() pagecache ops on directories

Updated under an hour ago (Oct 28, 2026, 6:10 AM ET)

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It affects Linux and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before 15487f98863dc7156ed43c5be26d478beb82ba35; from 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before bd23fa0c16c5c86e5b7713224ffbb87d9db81cca; from 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before 9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6; from 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before dd92773d4d9cea010474eb08a5133c14ff6ab53a; from 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before 99c317d7f8b7bbf3de16d20a01f363e390114cea; from 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before 12df4cfa738aefff21756728e91056d7defb0fe6; from 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before e692f0cb86204dcdb9dddc0b355407eda6394a67; from 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before 9c954499d43aefac01c5dfb57a82b13d2dcf4b94	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 4.20 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; and 5 more ranges	NVD

References

References

https://git.kernel.org/stable/c/15487f98863dc7156ed43c5be26d478beb82ba35	patch
https://git.kernel.org/stable/c/bd23fa0c16c5c86e5b7713224ffbb87d9db81cca	patch
https://git.kernel.org/stable/c/9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6	patch
https://git.kernel.org/stable/c/dd92773d4d9cea010474eb08a5133c14ff6ab53a	patch
https://git.kernel.org/stable/c/99c317d7f8b7bbf3de16d20a01f363e390114cea	patch
https://git.kernel.org/stable/c/12df4cfa738aefff21756728e91056d7defb0fe6	patch
https://git.kernel.org/stable/c/e692f0cb86204dcdb9dddc0b355407eda6394a67	patch
https://git.kernel.org/stable/c/9c954499d43aefac01c5dfb57a82b13d2dcf4b94	patch
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.