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CVE-2026-53168 (GCVE-0-2026-53168)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-06-25 08:38
VLAI
Title
fuse: reject fuse_notify() pagecache ops on directories
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 , < 15487f98863dc7156ed43c5be26d478beb82ba35 (git)
Affected: 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 , < bd23fa0c16c5c86e5b7713224ffbb87d9db81cca (git)
Affected: 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 , < 9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6 (git)
Affected: 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 , < dd92773d4d9cea010474eb08a5133c14ff6ab53a (git)
Affected: 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 , < 99c317d7f8b7bbf3de16d20a01f363e390114cea (git)
Affected: 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 , < 12df4cfa738aefff21756728e91056d7defb0fe6 (git)
Affected: 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 , < e692f0cb86204dcdb9dddc0b355407eda6394a67 (git)
Affected: 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0 , < 9c954499d43aefac01c5dfb57a82b13d2dcf4b94 (git)
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Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
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      "current_release_date": "2026-07-06T20:30:04+00:00",
      "cve": "CVE-2026-53168",
      "id": "CVE-2026-53168",
      "initial_release_date": "2026-06-25T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fuse: reject fuse_notify() pagecache ops on directories",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53168.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-10T16:57:41Z",
      "cve": "CVE-2026-53168",
      "id": "CVE-2026-53168",
      "initial_release_date": "2026-06-26T02:11:25Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "578",
      "product_status:known_not_affected": "125",
      "product_status:recommended": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53168",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53168.json",
      "version": "15"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.