Vulnerability-Lookup

FKIE_CVE-2024-50273

Vulnerability from fkie_nvd - Published: 2024-11-19 02:16 - Updated: 2026-08-04 11:21

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: btrfs: reinitialize delayed ref list after deleting it from the list At insert_delayed_ref() if we need to update the action of an existing ref to BTRFS_DROP_DELAYED_REF, we delete the ref from its ref head's ref_add_list using list_del(), which leaves the ref's add_list member not reinitialized, as list_del() sets the next and prev members of the list to LIST_POISON1 and LIST_POISON2, respectively. If later we end up calling drop_delayed_ref() against the ref, which can happen during merging or when destroying delayed refs due to a transaction abort, we can trigger a crash since at drop_delayed_ref() we call list_empty() against the ref's add_list, which returns false since the list was not reinitialized after the list_del() and as a consequence we call list_del() again at drop_delayed_ref(). This results in an invalid list access since the next and prev members are set to poison pointers, resulting in a splat if CONFIG_LIST_HARDENED and CONFIG_DEBUG_LIST are set or invalid poison pointer dereferences otherwise. So fix this by deleting from the list with list_del_init() instead.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2cb1a73d1d44a1c11b0ee5eeced765dd80ec48e6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2fd0948a483e9cb2d669c7199bc620a21c97673d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/50a3933760b427759afdd23156a7280a19357a92	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/93c5b8decc0ef39ba84f4211d2db6da0a4aefbeb	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bf0b0c6d159767c0d1c21f793950d78486690ee0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c24fa427fc0ae827b2a3a07f13738cbf82c3f851	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c9a75ec45f1111ef530ab186c2a7684d0a0c9245	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f04be6d68f715c1473a8422fc0460f57b5e99931	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.12
linux	linux_kernel	6.12
linux	linux_kernel	6.12
linux	linux_kernel	6.12
linux	linux_kernel	6.12
linux	linux_kernel	6.12

JSON

To clipboard

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              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.286",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.230",
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              "status": "unaffected",
              "version": "5.15.172",
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      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: reinitialize delayed ref list after deleting it from the list\n\nAt insert_delayed_ref() if we need to update the action of an existing\nref to BTRFS_DROP_DELAYED_REF, we delete the ref from its ref head\u0027s\nref_add_list using list_del(), which leaves the ref\u0027s add_list member\nnot reinitialized, as list_del() sets the next and prev members of the\nlist to LIST_POISON1 and LIST_POISON2, respectively.\n\nIf later we end up calling drop_delayed_ref() against the ref, which can\nhappen during merging or when destroying delayed refs due to a transaction\nabort, we can trigger a crash since at drop_delayed_ref() we call\nlist_empty() against the ref\u0027s add_list, which returns false since\nthe list was not reinitialized after the list_del() and as a consequence\nwe call list_del() again at drop_delayed_ref(). This results in an\ninvalid list access since the next and prev members are set to poison\npointers, resulting in a splat if CONFIG_LIST_HARDENED and\nCONFIG_DEBUG_LIST are set or invalid poison pointer dereferences\notherwise.\n\nSo fix this by deleting from the list with list_del_init() instead."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: reinicializar la lista de referencias retrasadas despu\u00e9s de eliminarla de la lista En insert_delayed_ref(), si necesitamos actualizar la acci\u00f3n de una referencia existente a BTRFS_DROP_DELAYED_REF, eliminamos la referencia de ref_add_list de su cabecera de referencia usando list_del(), lo que deja el miembro add_list de la referencia sin reinicializar, ya que list_del() establece los miembros siguiente y anterior de la lista en LIST_POISON1 y LIST_POISON2, respectivamente. Si m\u00e1s tarde terminamos llamando a drop_delayed_ref() contra la referencia, lo que puede suceder durante la fusi\u00f3n o al destruir referencias retrasadas debido a un aborto de transacci\u00f3n, podemos provocar un bloqueo ya que en drop_delayed_ref() llamamos a list_empty() contra el add_list de la referencia, que devuelve falso ya que la lista no se reinicializ\u00f3 despu\u00e9s de list_del() y, como consecuencia, llamamos a list_del() nuevamente en drop_delayed_ref(). Esto da como resultado un acceso a la lista no v\u00e1lido ya que los miembros next y prev est\u00e1n configurados como punteros envenenados, lo que resulta en un splat si CONFIG_LIST_HARDENED y CONFIG_DEBUG_LIST est\u00e1n configurados o desreferencias de punteros envenenados no v\u00e1lidas en caso contrario. As\u00ed que solucione esto eliminando de la lista con list_del_init() en su lugar."
    }
  ],
  "id": "CVE-2024-50273",
  "lastModified": "2026-08-04T11:21:39.270",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-50273",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-10-01T20:14:59.605584Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-11-19T02:16:29.483",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/2cb1a73d1d44a1c11b0ee5eeced765dd80ec48e6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/2fd0948a483e9cb2d669c7199bc620a21c97673d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/50a3933760b427759afdd23156a7280a19357a92"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/93c5b8decc0ef39ba84f4211d2db6da0a4aefbeb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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    },
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/c9a75ec45f1111ef530ab186c2a7684d0a0c9245"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

CVE-2024-50273 (GCVE-0-2024-50273)

Vulnerability from cvelistv5 – Published: 2024-11-19 01:30 – Updated: 2026-08-05 11:42

Title

btrfs: reinitialize delayed ref list after deleting it from the list

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 20:14 UTC

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

Linux mitre root Scorecard

References

10 references

URL	Tags
https://git.kernel.org/stable/c/2fd0948a483e9cb2d…
https://git.kernel.org/stable/c/93c5b8decc0ef39ba…
https://git.kernel.org/stable/c/bf0b0c6d159767c0d…
https://git.kernel.org/stable/c/c24fa427fc0ae827b…
https://git.kernel.org/stable/c/2cb1a73d1d44a1c11…
https://git.kernel.org/stable/c/f04be6d68f715c147…
https://git.kernel.org/stable/c/50a3933760b427759…
https://git.kernel.org/stable/c/c9a75ec45f1111ef5…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < 2fd0948a483e9cb2d669c7199bc620a21c97673d (git) Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < 93c5b8decc0ef39ba84f4211d2db6da0a4aefbeb (git) Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < bf0b0c6d159767c0d1c21f793950d78486690ee0 (git) Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < c24fa427fc0ae827b2a3a07f13738cbf82c3f851 (git) Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < 2cb1a73d1d44a1c11b0ee5eeced765dd80ec48e6 (git) Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < f04be6d68f715c1473a8422fc0460f57b5e99931 (git) Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < 50a3933760b427759afdd23156a7280a19357a92 (git) Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < c9a75ec45f1111ef530ab186c2a7684d0a0c9245 (git)
Linux	Linux	Affected: 4.10 Unaffected: 0 , < 4.10 (semver) Unaffected: 4.19.324 , ≤ 4.19.* (semver) Unaffected: 5.4.286 , ≤ 5.4.* (semver) Unaffected: 5.10.230 , ≤ 5.10.* (semver) Unaffected: 5.15.172 , ≤ 5.15.* (semver) Unaffected: 6.1.117 , ≤ 6.1.* (semver) Unaffected: 6.6.61 , ≤ 6.6.* (semver) Unaffected: 6.11.8 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-50273",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T20:14:59.605584Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-908",
                "description": "CWE-908 Use of Uninitialized Resource",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T20:17:23.045Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T22:27:54.002Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/delayed-ref.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2fd0948a483e9cb2d669c7199bc620a21c97673d",
              "status": "affected",
              "version": "1d57ee941692d0cc928526e21a1557b2ae3e11db",
              "versionType": "git"
            },
            {
              "lessThan": "93c5b8decc0ef39ba84f4211d2db6da0a4aefbeb",
              "status": "affected",
              "version": "1d57ee941692d0cc928526e21a1557b2ae3e11db",
              "versionType": "git"
            },
            {
              "lessThan": "bf0b0c6d159767c0d1c21f793950d78486690ee0",
              "status": "affected",
              "version": "1d57ee941692d0cc928526e21a1557b2ae3e11db",
              "versionType": "git"
            },
            {
              "lessThan": "c24fa427fc0ae827b2a3a07f13738cbf82c3f851",
              "status": "affected",
              "version": "1d57ee941692d0cc928526e21a1557b2ae3e11db",
              "versionType": "git"
            },
            {
              "lessThan": "2cb1a73d1d44a1c11b0ee5eeced765dd80ec48e6",
              "status": "affected",
              "version": "1d57ee941692d0cc928526e21a1557b2ae3e11db",
              "versionType": "git"
            },
            {
              "lessThan": "f04be6d68f715c1473a8422fc0460f57b5e99931",
              "status": "affected",
              "version": "1d57ee941692d0cc928526e21a1557b2ae3e11db",
              "versionType": "git"
            },
            {
              "lessThan": "50a3933760b427759afdd23156a7280a19357a92",
              "status": "affected",
              "version": "1d57ee941692d0cc928526e21a1557b2ae3e11db",
              "versionType": "git"
            },
            {
              "lessThan": "c9a75ec45f1111ef530ab186c2a7684d0a0c9245",
              "status": "affected",
              "version": "1d57ee941692d0cc928526e21a1557b2ae3e11db",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/delayed-ref.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.10"
            },
            {
              "lessThan": "4.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.324",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.286",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.230",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.172",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.117",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.61",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.324",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.286",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.230",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.172",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.117",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.61",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.11.8",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: reinitialize delayed ref list after deleting it from the list\n\nAt insert_delayed_ref() if we need to update the action of an existing\nref to BTRFS_DROP_DELAYED_REF, we delete the ref from its ref head\u0027s\nref_add_list using list_del(), which leaves the ref\u0027s add_list member\nnot reinitialized, as list_del() sets the next and prev members of the\nlist to LIST_POISON1 and LIST_POISON2, respectively.\n\nIf later we end up calling drop_delayed_ref() against the ref, which can\nhappen during merging or when destroying delayed refs due to a transaction\nabort, we can trigger a crash since at drop_delayed_ref() we call\nlist_empty() against the ref\u0027s add_list, which returns false since\nthe list was not reinitialized after the list_del() and as a consequence\nwe call list_del() again at drop_delayed_ref(). This results in an\ninvalid list access since the next and prev members are set to poison\npointers, resulting in a splat if CONFIG_LIST_HARDENED and\nCONFIG_DEBUG_LIST are set or invalid poison pointer dereferences\notherwise.\n\nSo fix this by deleting from the list with list_del_init() instead."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The delayed-ref machinery is driven by local filesystem syscalls (write, truncate, unlink, clone, subvolume/snapshot operations) against a mounted btrfs; there is no network-facing path into `insert_delayed_ref()`.\nAC:L - The attacker drives both halves entirely through their own workload \u2014 generating the delayed-ref sequence and then forcing `btrfs_merge_delayed_refs()`/transaction-abort cleanup via ordinary file I/O \u2014 with no dependence on external state or a race they cannot influence.\nPR:L - Only an unprivileged local account with write access to any btrfs filesystem (e.g. a home directory on a btrfs root fs) is needed; no CAP_SYS_ADMIN, no mount privileges, and no root in the init namespace.\nUI:N - No victim action is required \u2014 the attacker\u0027s own file operations on an already-mounted btrfs create the delayed refs and trigger the subsequent merge or abort-time cleanup.\nS:U - The corrupted list state and resulting fault are confined to the kernel\u0027s own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The double `list_del()` on a poisoned list entry is a list-corruption/memory-corruption condition in delayed-ref bookkeeping that, consistent with other btrfs list-corruption issues, can be leveraged toward disclosure of kernel memory contents.\nI:H - `__list_del()` performs two pointer writes derived from the corrupted `add_list` members, an unintended kernel write of the kind that underpins list-corruption exploitation, and the delayed-ref/extent accounting is left inconsistent on the affected filesystem.\nA:H - Dereferencing LIST_POISON1/LIST_POISON2 produces a kernel oops (or a hardened-list splat) while `head-\u003elock` and `delayed_refs-\u003elock` are held, hanging every other btrfs task on the filesystem and effectively panicking the system."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:42:57.250Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2fd0948a483e9cb2d669c7199bc620a21c97673d"
        },
        {
          "url": "https://git.kernel.org/stable/c/93c5b8decc0ef39ba84f4211d2db6da0a4aefbeb"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf0b0c6d159767c0d1c21f793950d78486690ee0"
        },
        {
          "url": "https://git.kernel.org/stable/c/c24fa427fc0ae827b2a3a07f13738cbf82c3f851"
        },
        {
          "url": "https://git.kernel.org/stable/c/2cb1a73d1d44a1c11b0ee5eeced765dd80ec48e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/f04be6d68f715c1473a8422fc0460f57b5e99931"
        },
        {
          "url": "https://git.kernel.org/stable/c/50a3933760b427759afdd23156a7280a19357a92"
        },
        {
          "url": "https://git.kernel.org/stable/c/c9a75ec45f1111ef530ab186c2a7684d0a0c9245"
        }
      ],
      "title": "btrfs: reinitialize delayed ref list after deleting it from the list",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50273",
    "datePublished": "2024-11-19T01:30:12.589Z",
    "dateReserved": "2024-10-21T19:36:19.983Z",
    "dateUpdated": "2026-08-05T11:42:57.250Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2024-50273

CVE-2024-50273 (GCVE-0-2024-50273)

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Related by attack behaviour