SB2026050219 - Improper Initialization in Linux kernel ipv6

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026050219

SB2026050219 - Improper Initialization in Linux kernel ipv6

Published: May 2, 2026

Security Bulletin ID SB2026050219
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Initialization (CVE-ID: CVE-2026-43040)

CWE-ID: CWE-665 - Improper Initialization

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


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to improper initialization in ndisc_ra_useropt when processing router advertisements with user options. A remote attacker can send a specially crafted router advertisement to disclose sensitive information.

The issue affects the RTM_NEWNDUSEROPT netlink message because padding fields in the nduseroptmsg structure are not zeroed before being exposed.


Remediation

Install update from vendor's website.

References