CVE-2025-40242 (GCVE-0-2025-40242)

Vulnerability from cvelistv5 – Published: 2025-12-04 15:31 – Updated: 2026-07-30 06:01
VLAI
Title
gfs2: Fix unlikely race in gdlm_put_lock
Summary
In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix unlikely race in gdlm_put_lock In gdlm_put_lock(), there is a small window of time in which the DFL_UNMOUNT flag has been set but the lockspace hasn't been released, yet. In that window, dlm may still call gdlm_ast() and gdlm_bast(). To prevent it from dereferencing freed glock objects, only free the glock if the lockspace has actually been released.
Severity
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d1340f80f0b8066321b499a376780da00560e857 , < 5fdc1474e678eea1700aa266c0b7c2c96f81dd0d (git)
Affected: d1340f80f0b8066321b499a376780da00560e857 , < 4913592a3358f6ec366b8346b733d5e2360b08e1 (git)
Affected: d1340f80f0b8066321b499a376780da00560e857 , < 279bde3bbb0ac0bad5c729dfa85983d75a5d7641 (git)
Affected: d1340f80f0b8066321b499a376780da00560e857 , < 64c61b4ac645222fa7b724cef616c1f862a72a40 (git)
Affected: d1340f80f0b8066321b499a376780da00560e857 , < 28c4d9bc0708956c1a736a9e49fee71b65deee81 (git)
Affected: 6aa628c45875e7b8cca81ed9447a12a0e8f3504a (git)
Affected: a97e75203733be0a4263a78fb7b29352be150c1c (git)
Affected: 3554b46204e67333e1fb8be0e93936fb08267c80 (git)
Affected: 5cff77b9827a956d076168b56775aad23bce87e4 (git)
Affected: 8deedce385d220f90e435f534d71d27526273515 (git)
Affected: 2225a5cd2fbc2ef0e0f78e585db3844f60416a39 (git)
Affected: 02e838963fdaa6ce8570b5389aecdc6cf1fb40b0 (git)
Affected: 01eb3106f43335fdc02111358dae80a5c3fd324d (git)
Affected: 4.4.284 , < 4.5 (semver)
Affected: 4.9.283 , < 4.10 (semver)
Affected: 4.14.247 , < 4.15 (semver)
Affected: 4.19.207 , < 4.20 (semver)
Affected: 5.4.148 , < 5.5 (semver)
Affected: 5.10.67 , < 5.11 (semver)
Affected: 5.13.19 , < 5.14 (semver)
Affected: 5.14.6 , < 5.15 (semver)
Create a notification for this product.
Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.131 , ≤ 6.6.* (semver)
Unaffected: 6.12.56 , ≤ 6.12.* (semver)
Unaffected: 6.17.6 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/gfs2/lock_dlm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5fdc1474e678eea1700aa266c0b7c2c96f81dd0d",
              "status": "affected",
              "version": "d1340f80f0b8066321b499a376780da00560e857",
              "versionType": "git"
            },
            {
              "lessThan": "4913592a3358f6ec366b8346b733d5e2360b08e1",
              "status": "affected",
              "version": "d1340f80f0b8066321b499a376780da00560e857",
              "versionType": "git"
            },
            {
              "lessThan": "279bde3bbb0ac0bad5c729dfa85983d75a5d7641",
              "status": "affected",
              "version": "d1340f80f0b8066321b499a376780da00560e857",
              "versionType": "git"
            },
            {
              "lessThan": "64c61b4ac645222fa7b724cef616c1f862a72a40",
              "status": "affected",
              "version": "d1340f80f0b8066321b499a376780da00560e857",
              "versionType": "git"
            },
            {
              "lessThan": "28c4d9bc0708956c1a736a9e49fee71b65deee81",
              "status": "affected",
              "version": "d1340f80f0b8066321b499a376780da00560e857",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6aa628c45875e7b8cca81ed9447a12a0e8f3504a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a97e75203733be0a4263a78fb7b29352be150c1c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3554b46204e67333e1fb8be0e93936fb08267c80",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5cff77b9827a956d076168b56775aad23bce87e4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8deedce385d220f90e435f534d71d27526273515",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "2225a5cd2fbc2ef0e0f78e585db3844f60416a39",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "02e838963fdaa6ce8570b5389aecdc6cf1fb40b0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "01eb3106f43335fdc02111358dae80a5c3fd324d",
              "versionType": "git"
            },
            {
              "lessThan": "4.5",
              "status": "affected",
              "version": "4.4.284",
              "versionType": "semver"
            },
            {
              "lessThan": "4.10",
              "status": "affected",
              "version": "4.9.283",
              "versionType": "semver"
            },
            {
              "lessThan": "4.15",
              "status": "affected",
              "version": "4.14.247",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.207",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.148",
              "versionType": "semver"
            },
            {
              "lessThan": "5.11",
              "status": "affected",
              "version": "5.10.67",
              "versionType": "semver"
            },
            {
              "lessThan": "5.14",
              "status": "affected",
              "version": "5.13.19",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15",
              "status": "affected",
              "version": "5.14.6",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/gfs2/lock_dlm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.168",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.131",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.168",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.131",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.56",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.6",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.4.284",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.9.283",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.14.247",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.19.207",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.4.148",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.10.67",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.13.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.14.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Fix unlikely race in gdlm_put_lock\n\nIn gdlm_put_lock(), there is a small window of time in which the\nDFL_UNMOUNT flag has been set but the lockspace hasn\u0027t been released,\nyet.  In that window, dlm may still call gdlm_ast() and gdlm_bast().\nTo prevent it from dereferencing freed glock objects, only free the\nglock if the lockspace has actually been released."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-30T06:01:37.607Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5fdc1474e678eea1700aa266c0b7c2c96f81dd0d"
        },
        {
          "url": "https://git.kernel.org/stable/c/4913592a3358f6ec366b8346b733d5e2360b08e1"
        },
        {
          "url": "https://git.kernel.org/stable/c/279bde3bbb0ac0bad5c729dfa85983d75a5d7641"
        },
        {
          "url": "https://git.kernel.org/stable/c/64c61b4ac645222fa7b724cef616c1f862a72a40"
        },
        {
          "url": "https://git.kernel.org/stable/c/28c4d9bc0708956c1a736a9e49fee71b65deee81"
        }
      ],
      "title": "gfs2: Fix unlikely race in gdlm_put_lock",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40242",
    "datePublished": "2025-12-04T15:31:31.497Z",
    "dateReserved": "2025-04-16T07:20:57.181Z",
    "dateUpdated": "2026-07-30T06:01:37.607Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-40242",
      "date": "2026-08-01",
      "epss": "0.00142",
      "percentile": "0.03984"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40242\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-04T16:16:17.390\",\"lastModified\":\"2026-07-30T06:24:19.547\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ngfs2: Fix unlikely race in gdlm_put_lock\\n\\nIn gdlm_put_lock(), there is a small window of time in which the\\nDFL_UNMOUNT flag has been set but the lockspace hasn\u0027t been released,\\nyet.  In that window, dlm may still call gdlm_ast() and gdlm_bast().\\nTo prevent it from dereferencing freed glock objects, only free the\\nglock if the lockspace has actually been released.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/gfs2/lock_dlm.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d1340f80f0b8066321b499a376780da00560e857\",\"lessThan\":\"5fdc1474e678eea1700aa266c0b7c2c96f81dd0d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d1340f80f0b8066321b499a376780da00560e857\",\"lessThan\":\"4913592a3358f6ec366b8346b733d5e2360b08e1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d1340f80f0b8066321b499a376780da00560e857\",\"lessThan\":\"279bde3bbb0ac0bad5c729dfa85983d75a5d7641\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d1340f80f0b8066321b499a376780da00560e857\",\"lessThan\":\"64c61b4ac645222fa7b724cef616c1f862a72a40\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d1340f80f0b8066321b499a376780da00560e857\",\"lessThan\":\"28c4d9bc0708956c1a736a9e49fee71b65deee81\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6aa628c45875e7b8cca81ed9447a12a0e8f3504a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a97e75203733be0a4263a78fb7b29352be150c1c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3554b46204e67333e1fb8be0e93936fb08267c80\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5cff77b9827a956d076168b56775aad23bce87e4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8deedce385d220f90e435f534d71d27526273515\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2225a5cd2fbc2ef0e0f78e585db3844f60416a39\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"02e838963fdaa6ce8570b5389aecdc6cf1fb40b0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"01eb3106f43335fdc02111358dae80a5c3fd324d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4.4.284\",\"lessThan\":\"4.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.9.283\",\"lessThan\":\"4.10\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.14.247\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.207\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.148\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.10.67\",\"lessThan\":\"5.11\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.13.19\",\"lessThan\":\"5.14\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.14.6\",\"lessThan\":\"5.15\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/gfs2/lock_dlm.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.168\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.131\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.56\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17.6\",\"lessThanOrEqual\":\"6.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.0,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/279bde3bbb0ac0bad5c729dfa85983d75a5d7641\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/28c4d9bc0708956c1a736a9e49fee71b65deee81\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4913592a3358f6ec366b8346b733d5e2360b08e1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5fdc1474e678eea1700aa266c0b7c2c96f81dd0d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/64c61b4ac645222fa7b724cef616c1f862a72a40\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T08:38:10+00:00",
      "cve": "CVE-2025-40242",
      "id": "CVE-2025-40242",
      "initial_release_date": "2025-12-04T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: gfs2: Fix unlikely race in gdlm_put_lock",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40242.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-19T17:46:17Z",
      "cve": "CVE-2025-40242",
      "id": "CVE-2025-40242",
      "initial_release_date": "2025-12-05T00:25:41Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "399",
      "product_status:known_not_affected": "134",
      "product_status:recommended": "621",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-40242",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-40242.json",
      "version": "46"
    }
  }
}



Log in or create an account to share your comment.




Tags
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.