CVE-2025-38546
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
atm: clip: Fix memory leak of struct clip_vcc.
ioctl(ATMARP_MKIP) allocates struct clip_vcc and set it to vcc->user_back.
The code assumes that vcc_destroy_socket() passes NULL skb to vcc->push() when the socket is close()d, and then clip_push() frees clip_vcc.
However, ioctl(ATMARPD_CTRL) sets NULL to vcc->push() in atm_init_atmarp(), resulting in memory leak.
Let's serialise two ioctl() by lock_sock() and check vcc->push() in atm_init_atmarp() to prevent memleak.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- 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-401
Referencias
- https://git.kernel.org/stable/c/0c17ff462d98c997d707ee5cf4e4a9b1b52b9d90
- https://git.kernel.org/stable/c/1c075e88d5859a2c6b43b27e0e46fb281cef8039
- https://git.kernel.org/stable/c/1fb9fb5a4b5cec2d56e26525ef8c519de858fa60
- https://git.kernel.org/stable/c/2fb37ab3226606cbfc9b2b6f9e301b0b735734c5
- https://git.kernel.org/stable/c/62dba28275a9a3104d4e33595c7b3328d4032d8d
- https://git.kernel.org/stable/c/9e4dbeee56f614e3f1e166e5d0655a999ea185ef
- https://git.kernel.org/stable/c/9f771816f14da6d6157a8c30069091abf6b566fb
- https://git.kernel.org/stable/c/cb2e4a2f8f268d8fba6662f663a2e57846f14a8d
- 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\natm: clip: Fix memory leak of struct clip_vcc.\n\nioctl(ATMARP_MKIP) allocates struct clip_vcc and set it to\nvcc->user_back.\n\nThe code assumes that vcc_destroy_socket() passes NULL skb\nto vcc->push() when the socket is close()d, and then clip_push()\nfrees clip_vcc.\n\nHowever, ioctl(ATMARPD_CTRL) sets NULL to vcc->push() in\natm_init_atmarp(), resulting in memory leak.\n\nLet's serialise two ioctl() by lock_sock() and check vcc->push()\nin atm_init_atmarp() to prevent memleak."
},
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: atm: clip: Se corrige la fuga de memoria de la estructura clip_vcc. ioctl(ATMARP_MKIP) asigna la estructura clip_vcc y la establece en vcc->user_back. El código asume que vcc_destroy_socket() pasa un skb nulo a vcc->push() cuando se cierra el socket, y que clip_push() libera clip_vcc. Sin embargo, ioctl(ATMARPD_CTRL) establece vcc->push() en nulo en atm_init_atmarp(), lo que provoca una fuga de memoria. Serialicemos dos ioctl() mediante lock_sock() y comprobemos vcc->push() en atm_init_atmarp() para evitar fugas de memoria."
}
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