CVE-2025-39839
Estado: ModificadaAlta (7.1)—
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: fix OOB read/write in network-coding decode
batadv_nc_skb_decode_packet() trusts coded_len and checks only against skb->len. XOR starts at sizeof(struct batadv_unicast_packet), reducing payload headroom, and the source skb length is not verified, allowing an out-of-bounds read and a small out-of-bounds write.
Validate that coded_len fits within the payload area of both destination and source sk_buffs before XORing.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Puntuación base: 7.1
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.25%
- Percentil entre todas las CVEs puntuadas: 15
- 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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation85 % - Impacto principal
T1059Command and Scripting Interpreterexecution75 % - Impacto secundario
T1499.004Application or System Exploitationimpact60 %
Vulnerabilidad de lectura/escritura fuera de límites (CWE-125) en kernel local (AV:L, PR:L) que permite escalada de privilegios y ejecución de código mediante manipulación de paquetes de red-coding en batman-adv.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (2)
CWE
- CWE-125
Referencias
- https://git.kernel.org/stable/c/1e36c6c8dc8023b4bbe9a16e819f9998b9b6a183
- https://git.kernel.org/stable/c/20080709457bc1e920eb002483d7d981d9b2ac1c
- https://git.kernel.org/stable/c/30fc47248f02b8a14a61df469e1da4704be1a19f
- https://git.kernel.org/stable/c/5d334bce9fad58cf328d8fa14ea1fff855819863
- https://git.kernel.org/stable/c/a67c6397fcb7e842d3c595243049940970541c48
- https://git.kernel.org/stable/c/bb37252c9af1cb250f34735ee98f80b46be3cef1
- https://git.kernel.org/stable/c/d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4087
- https://git.kernel.org/stable/c/dce6c2aa70e94c04c523b375dfcc664d7a0a560a
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://cert-portal.siemens.com/productcert/html/ssa-089022.html
JSON original (NVD)
Mostrar
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