Vulnerability-Lookup

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

Vulnerability from cvelistv5 – Published: 2024-12-07 06:40 – Updated: 2026-05-11 20:51

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 (v2.0.3)

CWE

CWE-416 - Use After Free

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/45a8f8232a495221e…
https://git.kernel.org/stable/c/83af1cfa10d9aafda…
https://git.kernel.org/stable/c/21d1b618b6b9da46c…
https://project-zero.issues.chromium.org/issues/3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d2f277e26f521ccf6fb438463b41dba6123caabe , < 45a8f8232a495221ed058191629f5c628f21601a (git) Affected: d2f277e26f521ccf6fb438463b41dba6123caabe , < 83af1cfa10d9aafdabd06b3655e07727f373b434 (git) Affected: d2f277e26f521ccf6fb438463b41dba6123caabe , < 21d1b618b6b9da46c5116c640ac4b1cc8d40d63a (git)
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"
    }
  }
}

WID-SEC-W-2024-3635

Vulnerability from csaf_certbund - Published: 2024-12-08 23:00 - Updated: 2025-07-20 22:00

Summary

Linux Kernel: Schwachstelle ermöglicht Denial of Service

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Der Kernel stellt den Kern des Linux Betriebssystems dar.

Angriff: Ein lokaler Angreifer kann eine Schwachstelle im Linux-Kernel ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen.

Betroffene Betriebssysteme: - Linux

CVE-2024-53143

Affected products

Known affected 5 products

Product	Identifier	Version
Ubuntu Linux Ubuntu	`cpe:/o:canonical:ubuntu_linux:-`	—
Open Source Linux Kernel <6.11.11 Open Source / Linux Kernel		<6.11.11
Open Source Linux Kernel <6.13-rc1 Open Source / Linux Kernel		<6.13-rc1
Open Source Linux Kernel <6.12.2 Open Source / Linux Kernel		<6.12.2
Oracle Linux Oracle	`cpe:/o:oracle:linux:-`	—

References

7 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://lore.kernel.org/linux-cve-announce/	external
https://lore.kernel.org/linux-cve-announce/202412…	external
https://ubuntu.com/security/notices/USN-7276-1	external
https://ubuntu.com/security/notices/USN-7310-1	external
https://linux.oracle.com/errata/ELSA-2025-20480.html	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Der Kernel stellt den Kern des Linux Betriebssystems dar.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein lokaler Angreifer kann eine Schwachstelle im Linux-Kernel ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2024-3635 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2024/wid-sec-w-2024-3635.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2024-3635 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2024-3635"
      },
      {
        "category": "external",
        "summary": "Kernel CVE Announce Mailingliste",
        "url": "https://lore.kernel.org/linux-cve-announce/"
      },
      {
        "category": "external",
        "summary": "Linux Kernel CVE Announcement CVE-2024-53143",
        "url": "https://lore.kernel.org/linux-cve-announce/2024120746-CVE-2024-53143-05ed@gregkh/"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-7276-1 vom 2025-02-19",
        "url": "https://ubuntu.com/security/notices/USN-7276-1"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-7310-1 vom 2025-02-28",
        "url": "https://ubuntu.com/security/notices/USN-7310-1"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2025-20480 vom 2025-07-18",
        "url": "https://linux.oracle.com/errata/ELSA-2025-20480.html"
      }
    ],
    "source_lang": "en-US",
    "title": "Linux Kernel: Schwachstelle erm\u00f6glicht Denial of Service",
    "tracking": {
      "current_release_date": "2025-07-20T22:00:00.000+00:00",
      "generator": {
        "date": "2025-07-21T08:22:30.782+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.4.0"
        }
      },
      "id": "WID-SEC-W-2024-3635",
      "initial_release_date": "2024-12-08T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2024-12-08T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2025-02-19T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2025-02-27T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2025-07-20T22:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c6.11.11",
                "product": {
                  "name": "Open Source Linux Kernel \u003c6.11.11",
                  "product_id": "T039634"
                }
              },
              {
                "category": "product_version",
                "name": "6.11.11",
                "product": {
                  "name": "Open Source Linux Kernel 6.11.11",
                  "product_id": "T039634-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:linux:linux_kernel:6.11.11"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c6.12.2",
                "product": {
                  "name": "Open Source Linux Kernel \u003c6.12.2",
                  "product_id": "T039635"
                }
              },
              {
                "category": "product_version",
                "name": "6.12.2",
                "product": {
                  "name": "Open Source Linux Kernel 6.12.2",
                  "product_id": "T039635-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:linux:linux_kernel:6.12.2"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c6.13-rc1",
                "product": {
                  "name": "Open Source Linux Kernel \u003c6.13-rc1",
                  "product_id": "T039636"
                }
              },
              {
                "category": "product_version",
                "name": "6.13-rc1",
                "product": {
                  "name": "Open Source Linux Kernel 6.13-rc1",
                  "product_id": "T039636-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:linux:linux_kernel:6.13-rc1"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Linux Kernel"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Oracle Linux",
            "product": {
              "name": "Oracle Linux",
              "product_id": "T004914",
              "product_identification_helper": {
                "cpe": "cpe:/o:oracle:linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Oracle"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Ubuntu Linux",
            "product": {
              "name": "Ubuntu Linux",
              "product_id": "T000126",
              "product_identification_helper": {
                "cpe": "cpe:/o:canonical:ubuntu_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Ubuntu"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2024-53143",
      "product_status": {
        "known_affected": [
          "T000126",
          "T039634",
          "T039636",
          "T039635",
          "T004914"
        ]
      },
      "release_date": "2024-12-08T23:00:00.000+00:00",
      "title": "CVE-2024-53143"
    }
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

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

WID-SEC-W-2024-3635

Tags

Sightings

Nomenclature