Vulnerability-Lookup

GHSA-3WJV-2739-3H75

Vulnerability from github – Published: 2024-06-19 15:30 – Updated: 2024-08-01 21:31

Details

In the Linux kernel, the following vulnerability has been resolved:

gfs2: Fix potential glock use-after-free on unmount

When a DLM lockspace is released and there ares still locks in that lockspace, DLM will unlock those locks automatically. Commit fb6791d100d1b started exploiting this behavior to speed up filesystem unmount: gfs2 would simply free glocks it didn't want to unlock and then release the lockspace. This didn't take the bast callbacks for asynchronous lock contention notifications into account, which remain active until until a lock is unlocked or its lockspace is released.

To prevent those callbacks from accessing deallocated objects, put the glocks that should not be unlocked on the sd_dead_glocks list, release the lockspace, and only then free those glocks.

As an additional measure, ignore unexpected ast and bast callbacks if the receiving glock is dead.

Severity ?

7.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2024-38570"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-06-19T14:15:17Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Fix potential glock use-after-free on unmount\n\nWhen a DLM lockspace is released and there ares still locks in that\nlockspace, DLM will unlock those locks automatically.  Commit\nfb6791d100d1b started exploiting this behavior to speed up filesystem\nunmount: gfs2 would simply free glocks it didn\u0027t want to unlock and then\nrelease the lockspace.  This didn\u0027t take the bast callbacks for\nasynchronous lock contention notifications into account, which remain\nactive until until a lock is unlocked or its lockspace is released.\n\nTo prevent those callbacks from accessing deallocated objects, put the\nglocks that should not be unlocked on the sd_dead_glocks list, release\nthe lockspace, and only then free those glocks.\n\nAs an additional measure, ignore unexpected ast and bast callbacks if\nthe receiving glock is dead.",
  "id": "GHSA-3wjv-2739-3h75",
  "modified": "2024-08-01T21:31:40Z",
  "published": "2024-06-19T15:30:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38570"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0636b34b44589b142700ac137b5f69802cfe2e37"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/501cd8fabf621d10bd4893e37f6ce6c20523c8ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d98779e687726d8f8860f1c54b5687eec5f63a73"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e42e8a24d7f02d28763d16ca7ec5fc6d1f142af0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-38570 (GCVE-0-2024-38570)

Vulnerability from cvelistv5 – Published: 2024-06-19 13:35 – Updated: 2025-05-04 09:14

Title

gfs2: Fix potential glock use-after-free on unmount

Summary

In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix potential glock use-after-free on unmount When a DLM lockspace is released and there ares still locks in that lockspace, DLM will unlock those locks automatically. Commit fb6791d100d1b started exploiting this behavior to speed up filesystem unmount: gfs2 would simply free glocks it didn't want to unlock and then release the lockspace. This didn't take the bast callbacks for asynchronous lock contention notifications into account, which remain active until until a lock is unlocked or its lockspace is released. To prevent those callbacks from accessing deallocated objects, put the glocks that should not be unlocked on the sd_dead_glocks list, release the lockspace, and only then free those glocks. As an additional measure, ignore unexpected ast and bast callbacks if the receiving glock is dead.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/0636b34b44589b142…
	https://git.kernel.org/stable/c/e42e8a24d7f02d287…
	https://git.kernel.org/stable/c/501cd8fabf621d10b…
	https://git.kernel.org/stable/c/d98779e687726d8f8…

Impacted products

Vendor

Product

Version

Linux

Affected: fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 , < 0636b34b44589b142700ac137b5f69802cfe2e37 (git)
Affected: fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 , < e42e8a24d7f02d28763d16ca7ec5fc6d1f142af0 (git)
Affected: fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 , < 501cd8fabf621d10bd4893e37f6ce6c20523c8ca (git)
Affected: fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 , < d98779e687726d8f8860f1c54b5687eec5f63a73 (git)

Linux

Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 6.6.33 , ≤ 6.6.* (semver)
Unaffected: 6.8.12 , ≤ 6.8.* (semver)
Unaffected: 6.9.3 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T04:12:25.837Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/0636b34b44589b142700ac137b5f69802cfe2e37"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/e42e8a24d7f02d28763d16ca7ec5fc6d1f142af0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/501cd8fabf621d10bd4893e37f6ce6c20523c8ca"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/d98779e687726d8f8860f1c54b5687eec5f63a73"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-38570",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T17:14:22.126008Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:34:56.284Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/gfs2/glock.c",
            "fs/gfs2/glock.h",
            "fs/gfs2/incore.h",
            "fs/gfs2/lock_dlm.c",
            "fs/gfs2/ops_fstype.c",
            "fs/gfs2/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0636b34b44589b142700ac137b5f69802cfe2e37",
              "status": "affected",
              "version": "fb6791d100d1bba20b5cdbc4912e1f7086ec60f8",
              "versionType": "git"
            },
            {
              "lessThan": "e42e8a24d7f02d28763d16ca7ec5fc6d1f142af0",
              "status": "affected",
              "version": "fb6791d100d1bba20b5cdbc4912e1f7086ec60f8",
              "versionType": "git"
            },
            {
              "lessThan": "501cd8fabf621d10bd4893e37f6ce6c20523c8ca",
              "status": "affected",
              "version": "fb6791d100d1bba20b5cdbc4912e1f7086ec60f8",
              "versionType": "git"
            },
            {
              "lessThan": "d98779e687726d8f8860f1c54b5687eec5f63a73",
              "status": "affected",
              "version": "fb6791d100d1bba20b5cdbc4912e1f7086ec60f8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/gfs2/glock.c",
            "fs/gfs2/glock.h",
            "fs/gfs2/incore.h",
            "fs/gfs2/lock_dlm.c",
            "fs/gfs2/ops_fstype.c",
            "fs/gfs2/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.8"
            },
            {
              "lessThan": "3.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.9.*",
              "status": "unaffected",
              "version": "6.9.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.10",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.33",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.12",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9.3",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.10",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Fix potential glock use-after-free on unmount\n\nWhen a DLM lockspace is released and there ares still locks in that\nlockspace, DLM will unlock those locks automatically.  Commit\nfb6791d100d1b started exploiting this behavior to speed up filesystem\nunmount: gfs2 would simply free glocks it didn\u0027t want to unlock and then\nrelease the lockspace.  This didn\u0027t take the bast callbacks for\nasynchronous lock contention notifications into account, which remain\nactive until until a lock is unlocked or its lockspace is released.\n\nTo prevent those callbacks from accessing deallocated objects, put the\nglocks that should not be unlocked on the sd_dead_glocks list, release\nthe lockspace, and only then free those glocks.\n\nAs an additional measure, ignore unexpected ast and bast callbacks if\nthe receiving glock is dead."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T09:14:20.334Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0636b34b44589b142700ac137b5f69802cfe2e37"
        },
        {
          "url": "https://git.kernel.org/stable/c/e42e8a24d7f02d28763d16ca7ec5fc6d1f142af0"
        },
        {
          "url": "https://git.kernel.org/stable/c/501cd8fabf621d10bd4893e37f6ce6c20523c8ca"
        },
        {
          "url": "https://git.kernel.org/stable/c/d98779e687726d8f8860f1c54b5687eec5f63a73"
        }
      ],
      "title": "gfs2: Fix potential glock use-after-free on unmount",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-38570",
    "datePublished": "2024-06-19T13:35:36.274Z",
    "dateReserved": "2024-06-18T19:36:34.923Z",
    "dateUpdated": "2025-05-04T09:14:20.334Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-3WJV-2739-3H75

CVE-2024-38570 (GCVE-0-2024-38570)

Tags

Sightings

Nomenclature