PT-2026-34407 · Linux · Linux Kernel

Published 2026-04-22 · Updated 2026-05-26 · CVE-2026-31502

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 A type confusion issue exists in the team module when handling non-Ethernet ports. The team setup by port() function copies port dev->header ops directly. Consequently, when the team device invokes dev hard header() or dev parse header(), these callbacks may execute using the team net device instead of the actual lower device. This causes netdev priv(dev) to be interpreted as the incorrect private type, potentially leading to a system crash. For example, in a topology consisting of gre, bond, and team, the bond header create() function may receive a team device and incorrectly interpret netdev priv() as bonding private data.

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

Type Confusion

Weakness Enumeration

CWE-843

Related Identifiers

CVE-2026-31502

ECHO-1FD5-1B22-0244

Affected Products

Linux Kernel

References · 15

• https://ubuntu.com/security/CVE-2026-31502 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31502 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-31502 · Vendor Advisory
• https://git.kernel.org/stable/c/6d3161fa3eee64d46b766fb0db33ec7f300ef52d · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31502 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-31502 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-31502 · Vendor Advisory
• https://git.kernel.org/stable/c/0a7468ed49a6b65d34abcc6eb60e15f7f6d34da0 · Patch
• https://git.kernel.org/stable/c/20491d384d973a63fbdaf7a71e38d69b0659ea55 · Patch
• https://cve.org/CVERecord?id=CVE-2026-31502 · Security Note
• https://git.kernel.org/stable/c/425000dbf17373a4ab8be9428f5dc055ef870a56 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31502 · Vendor Advisory
• https://git.kernel.org/linus/425000dbf17373a4ab8be9428f5dc055ef870a56 · Note
• https://docs.bell-sw.com/security/cves/CVE-2026-31502 · Note
• https://twitter.com/CVEnew/status/2046979973831876758 · Twitter Post