SB2026050888 - NULL pointer dereference in Linux kernel net bonding driver

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Main Vulnerability Database SB2026050888

SB2026050888 - NULL pointer dereference in Linux kernel net bonding driver

Published: May 8, 2026

Security Bulletin ID SB2026050888
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) NULL pointer dereference (CVE-ID: CVE-2026-43441)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to a NULL pointer dereference in the bonding driver IPv6 neighbor advertisement validation path when processing IPv6 NS/NA packets on a slave while ARP/NS validation is enabled and IPv6 is disabled. A remote attacker can send a specially crafted IPv6 NS/NA packet to trigger a kernel crash and cause a denial of service.

Exploitation requires the system to be booted with the 'ipv6.disable=1' parameter and bonding ARP/NS validation to be enabled.


Remediation

Install update from vendor's website.

References