SB20260824122 - Stack-based buffer overflow in Linux kernel netfilter ipvs

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Main Vulnerability Database SB20260824122

SB20260824122 - Stack-based buffer overflow in Linux kernel netfilter ipvs

Published: August 24, 2026

Security Bulletin ID SB20260824122
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) Stack-based buffer overflow (CVE-ID: CVE-2026-74669)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/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 a stack out-of-bounds write in ip_vs_in_icmp() when rebasing tunnel ICMP errors and processing IPv4 options. A remote attacker can send a specially crafted ICMP packet with IPv4 timestamp options to cause a denial of service.

The issue is triggered because stale IPv4 option metadata from the outer header is retained after the packet is rebased to the quoted original request.


Remediation

Install update from vendor's website.

References