CVE-2025-39839

Vulnerability overview

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.

Affected product and versions

Product

Linux Linux, RUGGEDCOM RST2428P, SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family

Affected versions

>= 2df5278b0267c799f3e877e8eeddbb6e93cda0bb < 30fc47248f02b8a14a61df469e1da4704be1a19f, >= 2df5278b0267c799f3e877e8eeddbb6e93cda0bb < 1e36c6c8dc8023b4bbe9a16e819f9998b9b6a183, >= 2df5278b0267c799f3e877e8eeddbb6e93cda0bb < 5d334bce9fad58cf328d8fa14ea1fff855819863, >= 2df5278b0267c799f3e877e8eeddbb6e93cda0bb < dce6c2aa70e94c04c523b375dfcc664d7a0a560a, >= 2df5278b0267c799f3e877e8eeddbb6e93cda0bb < bb37252c9af1cb250f34735ee98f80b46be3cef1, >= 2df5278b0267c799f3e877e8eeddbb6e93cda0bb < 20080709457bc1e920eb002483d7d981d9b2ac1c, >= 2df5278b0267c799f3e877e8eeddbb6e93cda0bb < a67c6397fcb7e842d3c595243049940970541c48, >= 2df5278b0267c799f3e877e8eeddbb6e93cda0bb < d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4087, >= 3.10, < V3.3, < V5.0, >= 3.10 < 5.4.299, >= 5.5 < 5.10.243, >= 5.11 < 5.15.192, >= 5.16 < 6.1.151, >= 6.2 < 6.6.105, >= 6.7 < 6.12.46, >= 6.13 < 6.16.6, 6.17, 11.0

Fixed versions

5.4.299, 5.10.243, 5.15.192, 6.1.151, 6.6.105, 6.12.46, 6.16.6

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CWE

CWE-125