SB20260507281 - Use of uninitialized resource in Linux kernel netfilter

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Main Vulnerability Database SB20260507281

SB20260507281 - Use of uninitialized resource in Linux kernel netfilter

Published: May 7, 2026

Security Bulletin ID SB20260507281
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use of uninitialized resource (CVE-ID: CVE-2026-43085)

CWE-ID: CWE-908 - Use of Uninitialized Resource

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


The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to an uninitialized memory use in nfnetlink_log NLMSG_DONE terminator handling when batching multiple NFLOG messages. A local user can trigger generation of a crafted NLMSG_DONE message to disclose sensitive information.

Four bytes of stale kernel heap data are leaked to userspace in the NLMSG_DONE message body when the queue length is greater than one.


Remediation

Install update from vendor's website.

References