Medium severity · published Jun 25, 2026
CVE-2026-53168
fuse: reject fuse_notify() pagecache ops on directories
5.5
CVSS
0.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
4.20 before 5.10.259; 5.11 before 5.15.210; 5.16 before 6.1.176; 6.2 before 6.6.143; 6.7 before 6.12.94; 6.13 before 6.18.36; +7 more · source: NVD
LI
Linux · Linux
5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before 15487f98863dc7156ed43c5be26d478beb82ba35; 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before bd23fa0c16c5c86e5b7713224ffbb87d9db81cca; 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before 9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6; 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before dd92773d4d9cea010474eb08a5133c14ff6ab53a; 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before 99c317d7f8b7bbf3de16d20a01f363e390114cea; 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 before 12df4cfa738aefff21756728e91056d7defb0fe6; +3 more · source: vendor
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53168
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-53168
Patch
https://git.kernel.org/stable/c/12df4cfa738aefff21756728e91056d7defb0fe6
Patch
https://git.kernel.org/stable/c/15487f98863dc7156ed43c5be26d478beb82ba35
Patch
https://git.kernel.org/stable/c/99c317d7f8b7bbf3de16d20a01f363e390114cea
Patch
https://git.kernel.org/stable/c/9c954499d43aefac01c5dfb57a82b13d2dcf4b94
Patch
https://git.kernel.org/stable/c/9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6
Patch
https://git.kernel.org/stable/c/bd23fa0c16c5c86e5b7713224ffbb87d9db81cca
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