CVE-2025-40242
Full vulnerability record from the local CVENow database.
Description
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
HIGH
CVSS score
7.0
(v3.1)
Vulnerability status
Deferred
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-12-04 16:16:17.390000
Last modified
2026-10-19 19:10:00.130000
View original CVE JSON
{
"id": "CVE-2025-40242",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-12-04T16:16:17.390",
"lastModified": "2026-10-19T19:10:00.130",
"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't 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."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ngfs2: Corrección de una condición de carrera improbable en gdlm_put_lock\n\nEn gdlm_put_lock(), existe una pequeña ventana de tiempo en la que la bandera DFL_UNMOUNT ha sido establecida, pero el lockspace aún no ha sido liberado. En esa ventana, dlm aún puede llamar a gdlm_ast() y gdlm_bast(). Para evitar que desreferencie objetos glock liberados, solo se debe liberar el glock si el lockspace ha sido realmente liberado."
}
],
"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"
},
{
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"lessThan": "64c61b4ac645222fa7b724cef616c1f862a72a40",
"versionType": "git",
"status": "affected"
},
{
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"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
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-15T21:58:20.770505Z",
"id": "CVE-2025-40242",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"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"
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]
}