PT-2026-39102 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43441

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/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 NULL pointer dereference occurs in the bonding network driver when the system is booted with the ipv6.disable=1 parameter. In this configuration, nd tbl is not initialized because inet6 init() exits before ndisc init() is called. If bonding ARP/NS validation is enabled, receiving an IPv6 Neighbor Solicitation (NS) or Neighbor Advertisement (NA) packet on a slave interface triggers bond validate na(), which subsequently calls bond has this ip6(). This execution path leads to ipv6 chk addr() and results in a system crash within the ipv6 chk addr and flags() function.

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

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-43441

Affected Products

Linux Kernel

References · 17

• https://security-tracker.debian.org/tracker/CVE-2026-43441 · Vendor Advisory
• https://git.kernel.org/stable/c/cf6099ef493b94e140b0fad52482a78853115318 · Patch
• https://git.kernel.org/stable/c/49dbfcb70eca5f6f9043594e1e323c74c39e3863 · Patch
• https://ubuntu.com/security/CVE-2026-43441 · Vendor Advisory
• https://git.kernel.org/stable/c/c78f01abe535853f13f0b26cd5b1d2f19bf52e2f · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43441 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43441 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43441 · Vendor Advisory
• https://git.kernel.org/stable/c/30021e969d48e5819d5ae56936c2f34c0f7ce997 · Patch
• https://git.kernel.org/stable/c/c9c238066fb254dabf65e27379f93c56112c5b96 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43441 · Vendor Advisory
• https://git.kernel.org/stable/c/95faa1459b83fa544191e82ccc73856f03b7741f · Patch
• https://cve.org/CVERecord?id=CVE-2026-43441 · Security Note
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post
• https://docs.bell-sw.com/security/cves/CVE-2026-43441 · Note