SB20260507243 - Always-Incorrect Control Flow Implementation in Linux kernel netfilter

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260507243

SB20260507243 - Always-Incorrect Control Flow Implementation in Linux kernel netfilter

Published: May 7, 2026

Security Bulletin ID SB20260507243
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Always-Incorrect Control Flow Implementation (CVE-ID: CVE-2026-43114)

CWE-ID: CWE-670 - Always-Incorrect Control Flow Implementation

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


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of stale bits in nft_set_pipapo_avx2 match functions in the netfilter pipapo set implementation when processing crafted set elements during avx2-based matching. A local user can load and reload a crafted pipapo set to cause a denial of service.

The issue occurs with avx2 matching functions and can cause a non-matching expired entry to be treated as a match after a set flush and reload operation.


Remediation

Install update from vendor's website.

References