SB20260827130 - Race condition in Linux kernel netfilter ipset

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Main Vulnerability Database SB20260827130

SB20260827130 - Race condition in Linux kernel netfilter ipset

Published: August 27, 2026

Security Bulletin ID SB20260827130
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-74748)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


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

The vulnerability exists due to a race condition in __ip_set_put_byindex() in the netfilter ipset subsystem when list:set garbage collection and set swap operations occur concurrently. A local user can trigger concurrent ipset operations to cause a denial of service.

The issue can lead to a kernel BUG and panic from timer softirq context.


Remediation

Install update from vendor's website.

References