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5.5
MEDIUM CVSS 3.1
CVE-2026-53168
fuse: reject fuse_notify() pagecache ops on directories
Overview
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.

Details
INFO

Published Date :

June 25, 2026, 9:16 a.m.

Last Modified :

July 6, 2026, 8:12 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-53168 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
Solution
Update the Linux kernel to prevent unauthorized access to directory pagecache operations.
  • Update the Linux kernel to the latest stable version.
  • Apply relevant security patches for the fuse module.
  • Ensure fuse daemons do not perform pagecache operations on directories.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-53168.

URL Resource
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 Patch
https://git.kernel.org/stable/c/dd92773d4d9cea010474eb08a5133c14ff6ab53a Patch
https://git.kernel.org/stable/c/e692f0cb86204dcdb9dddc0b355407eda6394a67 Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-53168 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-53168 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-53168 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-53168 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Jul. 06, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Added CWE NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.176 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.143 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.210 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.94 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.10.259
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/12df4cfa738aefff21756728e91056d7defb0fe6 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/15487f98863dc7156ed43c5be26d478beb82ba35 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/99c317d7f8b7bbf3de16d20a01f363e390114cea Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/9c954499d43aefac01c5dfb57a82b13d2dcf4b94 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/bd23fa0c16c5c86e5b7713224ffbb87d9db81cca Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/dd92773d4d9cea010474eb08a5133c14ff6ab53a Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/e692f0cb86204dcdb9dddc0b355407eda6394a67 Types: Patch
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jun. 25, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0', 'lessThan': '15487f98863dc7156ed43c5be26d478beb82ba35', 'versionType': 'git'}, {'status': 'affected', 'version': '5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0', 'lessThan': 'bd23fa0c16c5c86e5b7713224ffbb87d9db81cca', 'versionType': 'git'}, {'status': 'affected', 'version': '5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0', 'lessThan': '9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6', 'versionType': 'git'}, {'status': 'affected', 'version': '5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0', 'lessThan': 'dd92773d4d9cea010474eb08a5133c14ff6ab53a', 'versionType': 'git'}, {'status': 'affected', 'version': '5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0', 'lessThan': '99c317d7f8b7bbf3de16d20a01f363e390114cea', 'versionType': 'git'}, {'status': 'affected', 'version': '5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0', 'lessThan': '12df4cfa738aefff21756728e91056d7defb0fe6', 'versionType': 'git'}, {'status': 'affected', 'version': '5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0', 'lessThan': 'e692f0cb86204dcdb9dddc0b355407eda6394a67', 'versionType': 'git'}, {'status': 'affected', 'version': '5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0', 'lessThan': '9c954499d43aefac01c5dfb57a82b13d2dcf4b94', 'versionType': 'git'}], 'programFiles': ['fs/fuse/dev.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.20'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.20', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.259', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/fuse/dev.c'], 'defaultStatus': 'affected'}]
    Added 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.
    Added Reference https://git.kernel.org/stable/c/12df4cfa738aefff21756728e91056d7defb0fe6
    Added Reference https://git.kernel.org/stable/c/15487f98863dc7156ed43c5be26d478beb82ba35
    Added Reference https://git.kernel.org/stable/c/99c317d7f8b7bbf3de16d20a01f363e390114cea
    Added Reference https://git.kernel.org/stable/c/9c954499d43aefac01c5dfb57a82b13d2dcf4b94
    Added Reference https://git.kernel.org/stable/c/9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6
    Added Reference https://git.kernel.org/stable/c/bd23fa0c16c5c86e5b7713224ffbb87d9db81cca
    Added Reference https://git.kernel.org/stable/c/dd92773d4d9cea010474eb08a5133c14ff6ab53a
    Added Reference https://git.kernel.org/stable/c/e692f0cb86204dcdb9dddc0b355407eda6394a67
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 5.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact