VULNERABILITY INTELLIGENCE

CVE-2025-39839

CVSS score8.8 HIGH
EPSS probability0.26%
CISA KEVNot currently listed
Published2025-09-19
Last modified2026-10-19
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • nvd@nist.gov: CWE-125

Primary references