CVE-2024-43839
Estado: AnalizadaAlta (7.8)—
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bna: ajuste el tamaño del buf 'nombre' de las estructuras bna_tcb y bna_ccb para tener suficiente espacio para escribir todos los argumentos posibles de sprintf(). Actualmente el tamaño de 'nombre' es 16, pero es posible que el primer especificador '%s' ya necesite al menos 16 caracteres, ya que allí se usa 'bnad->netdev->name'. Para los especificadores '%d', supongamos que requieren: * 1 carácter para la suma 'tx_id + tx_info->tcb[i]->id', BNAD_MAX_TXQ_PER_TX es 8 * 2 caracteres para 'rx_id + rx_info->rx_ctrl[i]. ccb->id', BNAD_MAX_RXP_PER_RX es 16 y reemplace sprintf con snprintf. Detectado utilizando la herramienta de análisis estático - Svace.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.25%
- 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
- CWE-787
Referencias
- https://git.kernel.org/stable/c/6ce46045f9b90d952602e2c0b8886cfadf860bf1
- https://git.kernel.org/stable/c/6d20c4044ab4d0e6a99aa35853e66f0aed5589e3
- https://git.kernel.org/stable/c/ab748dd10d8742561f2980fea08ffb4f0cacfdef
- https://git.kernel.org/stable/c/b0ff0cd0847b03c0a0abe20cfa900eabcfcb9e43
- https://git.kernel.org/stable/c/c90b1cd7758fd4839909e838ae195d19f8065d76
- https://git.kernel.org/stable/c/c9741a03dc8e491e57b95fba0058ab46b7e506da
- https://git.kernel.org/stable/c/e0f48f51d55fb187400e9787192eda09fa200ff5
- https://git.kernel.org/stable/c/f121740f69eda4da2de9a20a6687a13593e72540
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbna: adjust 'name' buf size of bna_tcb and bna_ccb structures\n\nTo have enough space to write all possible sprintf() args. Currently\n'name' size is 16, but the first '%s' specifier may already need at\nleast 16 characters, since 'bnad->netdev->name' is used there.\n\nFor '%d' specifiers, assume that they require:\n * 1 char for 'tx_id + tx_info->tcb[i]->id' sum, BNAD_MAX_TXQ_PER_TX is 8\n * 2 chars for 'rx_id + rx_info->rx_ctrl[i].ccb->id', BNAD_MAX_RXP_PER_RX\n is 16\n\nAnd replace sprintf with snprintf.\n\nDetected using the static analysis tool - Svace."
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