CVE-2024-53143 (GCVE-0-2024-53143)

Vulnerability from cvelistv5 – Published: 2024-12-07 06:40 – Updated: 2026-08-05 11:44
VLAI
Title
fsnotify: Fix ordering of iput() and watched_objects decrement
Summary
In the Linux kernel, the following vulnerability has been resolved: fsnotify: Fix ordering of iput() and watched_objects decrement Ensure the superblock is kept alive until we're done with iput(). Holding a reference to an inode is not allowed unless we ensure the superblock stays alive, which fsnotify does by keeping the watched_objects count elevated, so iput() must happen before the watched_objects decrement. This can lead to a UAF of something like sb->s_fs_info in tmpfs, but the UAF is hard to hit because race orderings that oops are more likely, thanks to the CHECK_DATA_CORRUPTION() block in generic_shutdown_super(). Also, ensure that fsnotify_put_sb_watched_objects() doesn't call fsnotify_sb_watched_objects() on a superblock that may have already been freed, which would cause a UAF read of sb->s_fsnotify_info.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-11 14:22 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d2f277e26f521ccf6fb438463b41dba6123caabe , < 45a8f8232a495221ed058191629f5c628f21601a (git)
Affected: d2f277e26f521ccf6fb438463b41dba6123caabe , < 83af1cfa10d9aafdabd06b3655e07727f373b434 (git)
Affected: d2f277e26f521ccf6fb438463b41dba6123caabe , < 21d1b618b6b9da46c5116c640ac4b1cc8d40d63a (git)
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Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.11.11 , ≤ 6.11.* (semver)
Unaffected: 6.12.2 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
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    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-53143\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-12-11T14:22:39.197739Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-12-11T14:22:09.680Z\"}}], \"cna\": {\"title\": \"fsnotify: Fix ordering of iput() and watched_objects decrement\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"d2f277e26f521ccf6fb438463b41dba6123caabe\", \"lessThan\": \"45a8f8232a495221ed058191629f5c628f21601a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d2f277e26f521ccf6fb438463b41dba6123caabe\", \"lessThan\": \"83af1cfa10d9aafdabd06b3655e07727f373b434\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d2f277e26f521ccf6fb438463b41dba6123caabe\", \"lessThan\": \"21d1b618b6b9da46c5116c640ac4b1cc8d40d63a\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/notify/mark.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.11.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/notify/mark.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/45a8f8232a495221ed058191629f5c628f21601a\"}, {\"url\": \"https://git.kernel.org/stable/c/83af1cfa10d9aafdabd06b3655e07727f373b434\"}, {\"url\": \"https://git.kernel.org/stable/c/21d1b618b6b9da46c5116c640ac4b1cc8d40d63a\"}, {\"url\": \"https://project-zero.issues.chromium.org/issues/379667898\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfsnotify: Fix ordering of iput() and watched_objects decrement\\n\\nEnsure the superblock is kept alive until we\u0027re done with iput().\\nHolding a reference to an inode is not allowed unless we ensure the\\nsuperblock stays alive, which fsnotify does by keeping the\\nwatched_objects count elevated, so iput() must happen before the\\nwatched_objects decrement.\\nThis can lead to a UAF of something like sb-\u003es_fs_info in tmpfs, but the\\nUAF is hard to hit because race orderings that oops are more likely, thanks\\nto the CHECK_DATA_CORRUPTION() block in generic_shutdown_super().\\n\\nAlso, ensure that fsnotify_put_sb_watched_objects() doesn\u0027t call\\nfsnotify_sb_watched_objects() on a superblock that may have already been\\nfreed, which would cause a UAF read of sb-\u003es_fsnotify_info.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.11\", \"versionStartIncluding\": \"6.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.2\", \"versionStartIncluding\": \"6.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13\", \"versionStartIncluding\": \"6.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:54:07.791Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-53143\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T09:54:07.791Z\", \"dateReserved\": \"2024-11-19T17:17:24.997Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-12-07T06:40:43.522Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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.