PT-2026-37413 · Linux · Linux Kernel

Published 2026-05-06 · Updated 2026-05-06 · CVE-2026-43103

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description A flaw exists in the lapbether network driver where the lapbeth data transmit() function expects the underlying device type to be ARPHRD ETHER. The issue is addressed by returning NOTIFY BAD from the lapbeth device event() function to prevent the bonding driver from changing the device type and breaking this expectation.

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

Related Identifiers

CVE-2026-43103

Affected Products

Linux Kernel

References · 7

• https://git.kernel.org/stable/c/63851f60781aa89258c8f0952cd13940aab0888e · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43103 · Security Note
• https://git.kernel.org/stable/c/b120e4432f9f56c7103133d6a11245e617695adb · Patch
• https://git.kernel.org/stable/c/363a38044b8cd5b496d241651a1fb666e7c5fe3e · Patch
• https://git.kernel.org/stable/c/328bb2cff5c2ed973f595ded769e15f4b7a117be · Patch
• https://git.kernel.org/stable/c/b117056768ab7deb434e7d72065e48d2083a0c2a · Patch
• https://twitter.com/VulmonFeeds/status/2052018107380637821 · Twitter Post