CVEvulnerability

CVE-2025-39839

7.1 HIGH Published 2025-09-19 Modified 2026-10-19 Official page ↗
Status
Modified
Published
2025-09-19
Last modified
2026-10-19
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
8.8 HIGH — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
7.1 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Weaknesses
CWE-125

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.

Affected configurations

• linux linux kernel (>= 3.10 < 5.4.299) • linux linux kernel (>= 5.5 < 5.10.243) • linux linux kernel (>= 5.11 < 5.15.192) • linux linux kernel (>= 5.16 < 6.1.151) • linux linux kernel (>= 6.2 < 6.6.105) • linux linux kernel (>= 6.7 < 6.12.46) • linux linux kernel (>= 6.13 < 6.16.6) • linux linux kernel 6.17 • debian debian linux 11.0

Related

Weakness · CWE (1)

  • CWE-125 Out-of-bounds Read weakness

References