CVE-2025-38190
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
atm: Revert atm_account_tx() if copy_from_iter_full() fails.
In vcc_sendmsg(), we account skb->truesize to sk->sk_wmem_alloc by atm_account_tx().
It is expected to be reverted by atm_pop_raw() later called by vcc->dev->ops->send(vcc, skb).
However, vcc_sendmsg() misses the same revert when copy_from_iter_full() fails, and then we will leak a socket.
Let's factorise the revert part as atm_return_tx() and call it in the failure path.
Note that the corresponding sk_wmem_alloc operation can be found in alloc_tx() as of the blamed commit.
Detalles técnicos trazas, registros y código del informe original
$ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~
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: 0.20%
- Percentil entre todas las CVEs puntuadas: 9
- Fecha de la puntuación: 6/10/2026
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
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/2252c539c43f9a1431a7e8b34e3c18e9dd77a96d
- https://git.kernel.org/stable/c/287b4f085d2ca3375cf1ee672af27410c64777e8
- https://git.kernel.org/stable/c/3902205eadf35db59dbc2186c2a98b9e6182efa5
- https://git.kernel.org/stable/c/3d828519bd69bfcaabdd942a872679617ef06739
- https://git.kernel.org/stable/c/5e0d00992118e234ebf29d5145c1cc920342777e
- https://git.kernel.org/stable/c/7851263998d4269125fd6cb3fdbfc7c6db853859
- https://git.kernel.org/stable/c/7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685
- https://git.kernel.org/stable/c/c12430edd92fd49a4800b0f3fb395b50cb16bcc1
- 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: Revert atm_account_tx() if copy_from_iter_full() fails.\n\nIn vcc_sendmsg(), we account skb->truesize to sk->sk_wmem_alloc by\natm_account_tx().\n\nIt is expected to be reverted by atm_pop_raw() later called by\nvcc->dev->ops->send(vcc, skb).\n\nHowever, vcc_sendmsg() misses the same revert when copy_from_iter_full()\nfails, and then we will leak a socket.\n\nLet's factorise the revert part as atm_return_tx() and call it in\nthe failure path.\n\nNote that the corresponding sk_wmem_alloc operation can be found in\nalloc_tx() as of the blamed commit.\n\n $ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: atm: Revertir atm_account_tx() si copy_from_iter_full() falla. En vcc_sendmsg(), contabilizamos skb->truesize como sk->sk_wmem_alloc mediante atm_account_tx(). Se espera que sea revertido por atm_pop_raw(), posteriormente llamado por vcc->dev->ops->send(vcc, skb). Sin embargo, vcc_sendmsg() no realiza la misma reversión cuando copy_from_iter_full() falla, y entonces se filtrará un socket. Factoricemos la parte de la reversión como atm_return_tx() y la llamemos en la ruta de error. Tenga en cuenta que la operación sk_wmem_alloc correspondiente se puede encontrar en alloc_tx() a partir de la confirmación culpable. $ git culpa -L:alloc_tx net/atm/common.c c55fa3ccccc2c~"
}
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"lastModified": "2026-06-17T09:16:21.303",
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