SB2026041416 - Improper control of a resource through its lifetime in Linux kernel netfilter ipset
Published: April 14, 2026
Security Bulletin ID
SB2026041416
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-31418)
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper resource management in mtype_del in the ipset netfilter subsystem when deleting entries from buckets containing only deleted slots below the current position. A local user can trigger bucket deletion handling with crafted set operations to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/68ca0eea0af02bed36c5e2c13e9fa1647c31a7d4
- https://git.kernel.org/stable/c/6cea34d7ec6829b62f521a37a287f670144a2233
- https://git.kernel.org/stable/c/9862ef9ab0a116c6dca98842aab7de13a252ae02
- https://git.kernel.org/stable/c/ad92ee87462f9a3061361d392e9dbfe2e5c1c9fb
- https://git.kernel.org/stable/c/b7eef00f08b92b0b9efe8ae0df6d0005e6199323
- https://git.kernel.org/stable/c/ceacaa76f221a6577aba945bb8873c2e640aeba4