Fiche vulnérabilité
CVE-2025-39839 : faille élevée linux linux kernel (CVSS 7.1)
Description
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.
En bref
- Sévérité
- Élevée (CVSS 7.1)
- Vecteur CVSS
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Exploitation active
- Non signalée par la CISA
- Publication
- 19 sept. 2025
- Dernière mise à jour
- 30 juil. 2026
Produits concernés
- linux linux kernel
- debian debian linux
Références
- Fiche CVE-2025-39839 sur le NVD (NIST)
- git.kernel.org/stable/c/1e36c6c8dc8023b4bbe9a16e819f9998b9b6a…
- git.kernel.org/stable/c/20080709457bc1e920eb002483d7d981d9b2a…
- git.kernel.org/stable/c/30fc47248f02b8a14a61df469e1da4704be1a…
- git.kernel.org/stable/c/5d334bce9fad58cf328d8fa14ea1fff855819…
- git.kernel.org/stable/c/a67c6397fcb7e842d3c595243049940970541…
- git.kernel.org/stable/c/bb37252c9af1cb250f34735ee98f80b46be3c…
- git.kernel.org/stable/c/d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4…
- git.kernel.org/stable/c/dce6c2aa70e94c04c523b375dfcc664d7a0a5…
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- cert-portal.siemens.com/productcert/html/ssa-032379.html
- cert-portal.siemens.com/productcert/html/ssa-089022.html