SB20260815304 - Always-Incorrect Control Flow Implementation in Linux kernel netfilter

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Main Vulnerability Database SB20260815304

SB20260815304 - Always-Incorrect Control Flow Implementation in Linux kernel netfilter

Published: August 15, 2026

Security Bulletin ID SB20260815304
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Partial DoS

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Always-Incorrect Control Flow Implementation (CVE-ID: CVE-2026-72418)

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

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


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

The vulnerability exists due to improper state handling in nf_conncount when processing early-confirmed connection tracking entries for reused TIME_WAIT sockets or similar setup packets. A remote attacker can initiate network connections that trigger miscounting to cause a denial of service.

The issue can cause valid new connections to be falsely rejected in connlimit soft-limiting scenarios.


Remediation

Install update from vendor's website.

References