CVE-2025-38112
Estado: AnalizadaMedia (4.7)—
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.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 4.7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.14%
- Percentil entre todas las CVEs puntuadas: 3
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (2)
CWE
- CWE-367
Referencias
- https://git.kernel.org/stable/c/1b367ba2f94251822577daed031d6b9a9e11ba91
- https://git.kernel.org/stable/c/1e0de7582ceccbdbb227d4e0ddf65732f92526da
- https://git.kernel.org/stable/c/2660a544fdc0940bba15f70508a46cf9a6491230
- https://git.kernel.org/stable/c/6fa68d7eab34d448a61aa24ea31e68b3231ed20d
- https://git.kernel.org/stable/c/8926a7ef1977a832dd6bf702f1a99303dbf15b15
- https://git.kernel.org/stable/c/c2b26638476baee154920bb587fc94ff1bf04336
- https://git.kernel.org/stable/c/ff55c85a923e043d59d26b20a673a1b4a219c310
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
JSON original (NVD)
Mostrar
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"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."
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}
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