PT-2026-35143 · Linux · Linux Kernel

Published 2026-04-25 · Updated 2026-05-06 · CVE-2026-31683

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the batman-adv module where OGM aggregation can lead to a buffer overflow. When the OGM aggregation state is toggled during runtime, a forwarded packet might be allocated with only packet len bytes. If a subsequent packet is selected for aggregation and appended, it can trigger skb put overflow conditions if the target skb tailroom is insufficient to accommodate the new packet.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-31683

ECHO-DFC6-ED7D-9BDC

Affected Products

Linux Kernel

References · 20

• https://git.kernel.org/stable/c/6755347c5f9bdd44dee80f692208b056fcd40a52 · Patch
• https://git.kernel.org/stable/c/1ada20331f2df2a942d6b83ae1f04a304b642e2a · Patch
• https://git.kernel.org/stable/c/6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075 · Patch
• https://git.kernel.org/stable/c/0d4aef630be9d5f9c1227d07669c26c4383b5ad0 · Patch
• https://git.kernel.org/stable/c/0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8 · Patch
• https://ubuntu.com/security/CVE-2026-31683 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31683 · Vendor Advisory
• https://git.kernel.org/stable/c/67176c96f325837b0bb3e9538ca2eba414f447d8 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31683 · Vendor Advisory
• https://git.kernel.org/stable/c/eda89a1bae0602aec8314ced299bb243b9f9aeef · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-31683 · Vendor Advisory
• https://git.kernel.org/stable/c/0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1 · Patch
• https://cve.org/CVERecord?id=CVE-2026-31683 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31683 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-31683 · Vendor Advisory