CVE-2026-53168
Last modified
CVE-2026-53168 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 4.20, < 5.10.259 | — |
| Linux | Linux Kernel | >= 5.11, < 5.15.210 | — |
| Linux | Linux Kernel | >= 5.16, < 6.1.176 | — |
| Linux | Linux Kernel | >= 6.2, < 6.6.143 | — |
| Linux | Linux Kernel | >= 6.7, < 6.12.94 | — |
| Linux | Linux Kernel | >= 6.13, < 6.18.36 | — |
| Linux | Linux Kernel | >= 6.19, < 7.0.13 | — |
| Linux | Linux Kernel | 7.1 | Rc1 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-53168?
How severe is CVE-2026-53168?
How do I fix CVE-2026-53168?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-53162In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-53163In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-53164In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-53165In the Linux kernel, the following vulnerability has been re…7.5
- CVE-2026-53166Rejected reason: This CVE ID has been rejected or withdrawn …
- CVE-2026-53167In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-53169In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-5317A security flaw has been discovered in Nothings stb up to 1.…8.8
- CVE-2026-53170In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-53171In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-53172In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-53173In the Linux kernel, the following vulnerability has been re…7.8
Are you affected by CVE-2026-53168?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST