CVE-2025-38112
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: net: Fix TOCTOU issue in sk_is_readable() sk->sk_prot->sock_is_readable is a valid function pointer when sk resides in a sockmap. After the last sk_psock_put() (which usually happens when socket is removed from sockmap), sk->sk_prot gets restored and sk->sk_prot->sock_is_readable becomes NULL. This makes sk_is_readable() racy, if the value of sk->sk_prot is reloaded after the initial check. Which in turn may lead to a null pointer dereference. Ensure the function pointer does not turn NULL after the check.
Severity
MEDIUM
CVSS score
4.7
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-07-03 09:15:24.960000
Last modified
2026-11-05 21:18:10.200000
View original CVE JSON
{
"id": "CVE-2025-38112",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-07-03T09:15:24.960",
"lastModified": "2026-11-05T21:18:10.200",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: Fix TOCTOU issue in sk_is_readable()\n\nsk->sk_prot->sock_is_readable is a valid function pointer when sk resides\nin a sockmap. After the last sk_psock_put() (which usually happens when\nsocket is removed from sockmap), sk->sk_prot gets restored and\nsk->sk_prot->sock_is_readable becomes NULL.\n\nThis makes sk_is_readable() racy, if the value of sk->sk_prot is reloaded\nafter the initial check. Which in turn may lead to a null pointer\ndereference.\n\nEnsure the function pointer does not turn NULL after the check."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: Se solucionó el problema de TOCTOU en sk_is_readable(). sk->sk_prot->sock_is_readable es un puntero a función válido cuando sk reside en un mapa de sockets. Tras el último sk_psock_put() (que suele ocurrir al eliminar un socket de un mapa de sockets), sk->sk_prot se restaura y sk->sk_prot->sock_is_readable se convierte en NULL. Esto hace que sk_is_readable() sea arriesgado si el valor de sk->sk_prot se recarga después de la comprobación inicial. Esto, a su vez, puede provocar una desreferencia de puntero nulo. Asegúrese de que el puntero a función no se convierta en NULL después de la comprobación."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"include/net/sock.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "8934ce2fd08171e8605f7fada91ee7619fe17ab8",
"lessThan": "c2b26638476baee154920bb587fc94ff1bf04336",
"versionType": "git",
"status": "affected"
},
{
"version": "8934ce2fd08171e8605f7fada91ee7619fe17ab8",
"lessThan": "6fa68d7eab34d448a61aa24ea31e68b3231ed20d",
"versionType": "git",
"status": "affected"
},
{
"version": "8934ce2fd08171e8605f7fada91ee7619fe17ab8",
"lessThan": "8926a7ef1977a832dd6bf702f1a99303dbf15b15",
"versionType": "git",
"status": "affected"
},
{
"version": "8934ce2fd08171e8605f7fada91ee7619fe17ab8",
"lessThan": "ff55c85a923e043d59d26b20a673a1b4a219c310",
"versionType": "git",
"status": "affected"
},
{
"version": "8934ce2fd08171e8605f7fada91ee7619fe17ab8",
"lessThan": "1e0de7582ceccbdbb227d4e0ddf65732f92526da",
"versionType": "git",
"status": "affected"
},
{
"version": "8934ce2fd08171e8605f7fada91ee7619fe17ab8",
"lessThan": "1b367ba2f94251822577daed031d6b9a9e11ba91",
"versionType": "git",
"status": "affected"
},
{
"version": "8934ce2fd08171e8605f7fada91ee7619fe17ab8",
"lessThan": "2660a544fdc0940bba15f70508a46cf9a6491230",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"include/net/sock.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "4.17",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.17",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.239",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.186",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.142",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.94",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.34",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.15.3",
"lessThanOrEqual": "6.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.16",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 4.7,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "HIGH",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.0,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-05T20:49:48.418942Z",
"id": "CVE-2025-38112",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-367"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.17",
"versionEndExcluding": "5.10.239",
"matchCriteriaId": "30CEFAA7-EE3A-415E-A006-A2F534E88EAC"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.11",
"versionEndExcluding": "5.15.186",
"matchCriteriaId": "D96F2C0D-0D4A-4658-AD34-D8A626EA422D"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.16",
"versionEndExcluding": "6.1.142",
"matchCriteriaId": "459B4E94-FE0E-434D-B782-95E3A5FFC6B1"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.2",
"versionEndExcluding": "6.6.94",
"matchCriteriaId": "304E3F01-7D7A-4908-994E-7F95C5C00B06"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.7",
"versionEndExcluding": "6.12.34",
"matchCriteriaId": "4FFA54AA-CDFE-4591-BD07-72813D0948F4"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.13",
"versionEndExcluding": "6.15.3",
"matchCriteriaId": "0541C761-BD5E-4C1A-8432-83B375D7EB92"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*",
"matchCriteriaId": "6D4894DB-CCFE-4602-B1BF-3960B2E19A01"
}
]
}
]
},
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/1b367ba2f94251822577daed031d6b9a9e11ba91",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/1e0de7582ceccbdbb227d4e0ddf65732f92526da",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/2660a544fdc0940bba15f70508a46cf9a6491230",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/6fa68d7eab34d448a61aa24ea31e68b3231ed20d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/8926a7ef1977a832dd6bf702f1a99303dbf15b15",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/c2b26638476baee154920bb587fc94ff1bf04336",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/ff55c85a923e043d59d26b20a673a1b4a219c310",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html",
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
]
}
]
}