SB2026082467 - Improper control of a resource through its lifetime in Linux kernel ipv4

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Main Vulnerability Database SB2026082467

SB2026082467 - Improper control of a resource through its lifetime in Linux kernel ipv4

Published: August 24, 2026

Security Bulletin ID SB2026082467
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) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-74696)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/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 management in TCP Fast Open listener queue accounting when migrating pending Fast Open children across SO_REUSEPORT listeners. A remote attacker can establish multiple pending Fast Open requests during listener migration to cause a denial of service.

This only occurs with SO_REUSEPORT listener migration involving still-pending TCP Fast Open children.


Remediation

Install update from vendor's website.

References