CVE-2025-71135
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: md/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt() The variable mddev->private is first assigned to conf and then checked: conf = mddev->private; if (!conf) ... If conf is NULL, then mddev->private is also NULL. In this case, null-pointer dereferences can occur when calling raid5_quiesce(): raid5_quiesce(mddev, true); raid5_quiesce(mddev, false); since mddev->private is assigned to conf again in raid5_quiesce(), and conf is dereferenced in several places, for example: conf->quiesce = 0; wake_up(&conf->wait_for_quiescent); To fix this issue, the function should unlock mddev and return before invoking raid5_quiesce() when conf is NULL, following the existing pattern in raid5_change_consistency_policy().
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-01-14 15:16:03.277000
Last modified
2026-11-05 22:17:37.810000
View original CVE JSON
{
"id": "CVE-2025-71135",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-01-14T15:16:03.277",
"lastModified": "2026-11-05T22:17:37.810",
"vulnStatus": "Analyzed",
"cveTags": [],
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt()\n\nThe variable mddev->private is first assigned to conf and then checked:\n\n conf = mddev->private;\n if (!conf) ...\n\nIf conf is NULL, then mddev->private is also NULL. In this case,\nnull-pointer dereferences can occur when calling raid5_quiesce():\n\n raid5_quiesce(mddev, true);\n raid5_quiesce(mddev, false);\n\nsince mddev->private is assigned to conf again in raid5_quiesce(), and conf\nis dereferenced in several places, for example:\n\n conf->quiesce = 0;\n wake_up(&conf->wait_for_quiescent);\n\nTo fix this issue, the function should unlock mddev and return before\ninvoking raid5_quiesce() when conf is NULL, following the existing pattern\nin raid5_change_consistency_policy()."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmd/raid5: corrige posibles desreferencias de puntero nulo en raid5_store_group_thread_cnt()\n\nLa variable mddev->private se asigna primero a conf y luego se comprueba:\n\n conf = mddev->private;\n if (!conf) ...\n\nSi conf es NULL, entonces mddev->private también es NULL. En este caso,\npueden ocurrir desreferencias de puntero nulo al llamar a raid5_quiesce():\n\n raid5_quiesce(mddev, true);\n raid5_quiesce(mddev, false);\n\nya que mddev->private se asigna a conf de nuevo en raid5_quiesce(), y conf\nse desreferencia en varios lugares, por ejemplo:\n\n conf->quiesce = 0;\n wake_up(&conf->wait_for_quiescent);\n\nPara solucionar este problema, la función debería desbloquear mddev y retornar antes de\ninvocar raid5_quiesce() cuando conf es NULL, siguiendo el patrón existente\nen raid5_change_consistency_policy()."
}
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"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
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"id": "CVE-2025-71135",
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"description": [
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