CVE-2025-39839

HIGH

Linux Kernel < 5.4.299 - Out-of-Bounds Read

Title source: rule
STIX 2.1

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.

References (10)

Core 10
Core References

Scores

CVSS v3 7.1
EPSS 0.0002
EPSS Percentile 3.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Details

CWE
CWE-125
Status published
Products (10)
debian/debian_linux 11.0
linux/Kernel 3.10.0 - 5.4.299linux
linux/Kernel 5.11.0 - 5.15.192linux
linux/Kernel 5.16.0 - 6.1.151linux
linux/Kernel 5.5.0 - 5.10.243linux
linux/Kernel 6.13.0 - 6.16.6linux
linux/Kernel 6.2.0 - 6.6.105linux
linux/Kernel 6.7.0 - 6.12.46linux
linux/linux_kernel 6.17 rc1 (4 CPE variants)
linux/linux_kernel 3.10 - 5.4.299
Published Sep 19, 2025
Tracked Since Feb 18, 2026