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fuse: reject fuse_notify() pagecache ops on directories

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-53168

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-53168

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "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"
  }
]
Related CVEs
CVE-2026-53168

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#28435 · Revision 1
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Publisher date
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