CVE-2024-35958
Estado: ModificadaMedia (5.5)—
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: ena: soluciona el comportamiento incorrecto sin descriptor. ENA tiene dos tipos de colas TX: - colas que solo procesan paquetes TX que llegan desde la pila de red - colas que solo procesan paquetes TX reenviados a mediante instrucciones XDP_REDIRECT o XDP_TX. Ena_free_tx_bufs() recorre todos los descriptores en una cola de TX y desasigna + libera todos los descriptores que aún no han sido reconocidos por el dispositivo (transacciones de TX incompletas).
Leer descripción completaMostrar menos
La función supone que la cola TX procesada es necesariamente de la primera categoría enumerada anteriormente y termina usando napi_consume_skb() para los descriptores que pertenecen a una cola XDP específica. Este parche resuelve un error por el cual, en caso de restablecer VF, los descriptores no se liberan correctamente, lo que provoca fallos.
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: 0.26%
- Percentil entre todas las CVEs puntuadas: 16
- Fecha de la puntuación: 8/10/2026
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/19ff8fed3338898b70b2aad831386c78564912e1
- https://git.kernel.org/stable/c/5c7f2240d9835a7823d87f7460d8eae9f4e504c7
- https://git.kernel.org/stable/c/b26aa765f7437e1bbe8db4c1641b12bd5dd378f0
- https://git.kernel.org/stable/c/bf02d9fe00632d22fa91d34749c7aacf397b6cde
- https://git.kernel.org/stable/c/c31baa07f01307b7ae05f3ce32b89d8e2ba0cc1d
- https://git.kernel.org/stable/c/fdfbf54d128ab6ab255db138488f9650485795a2
- https://git.kernel.org/stable/c/19ff8fed3338898b70b2aad831386c78564912e1
- https://git.kernel.org/stable/c/5c7f2240d9835a7823d87f7460d8eae9f4e504c7
- https://git.kernel.org/stable/c/b26aa765f7437e1bbe8db4c1641b12bd5dd378f0
- https://git.kernel.org/stable/c/bf02d9fe00632d22fa91d34749c7aacf397b6cde
- https://git.kernel.org/stable/c/c31baa07f01307b7ae05f3ce32b89d8e2ba0cc1d
- https://git.kernel.org/stable/c/fdfbf54d128ab6ab255db138488f9650485795a2
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-613116.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ena: Fix incorrect descriptor free behavior\n\nENA has two types of TX queues:\n- queues which only process TX packets arriving from the network stack\n- queues which only process TX packets forwarded to it by XDP_REDIRECT\n or XDP_TX instructions\n\nThe ena_free_tx_bufs() cycles through all descriptors in a TX queue\nand unmaps + frees every descriptor that hasn't been acknowledged yet\nby the device (uncompleted TX transactions).\nThe function assumes that the processed TX queue is necessarily from\nthe first category listed above and ends up using napi_consume_skb()\nfor descriptors belonging to an XDP specific queue.\n\nThis patch solves a bug in which, in case of a VF reset, the\ndescriptors aren't freed correctly, leading to crashes."
},
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"value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: ena: soluciona el comportamiento incorrecto sin descriptor. ENA tiene dos tipos de colas TX: - colas que solo procesan paquetes TX que llegan desde la pila de red - colas que solo procesan paquetes TX reenviados a mediante instrucciones XDP_REDIRECT o XDP_TX. Ena_free_tx_bufs() recorre todos los descriptores en una cola de TX y desasigna + libera todos los descriptores que aún no han sido reconocidos por el dispositivo (transacciones de TX incompletas). La función supone que la cola TX procesada es necesariamente de la primera categoría enumerada anteriormente y termina usando napi_consume_skb() para los descriptores que pertenecen a una cola XDP específica. Este parche resuelve un error por el cual, en caso de restablecer VF, los descriptores no se liberan correctamente, lo que provoca fallos."
}
],
"lastModified": "2026-08-04T11:18:15.330",
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