SB2026032901 - Memory leak in Linux kernel netfilter
Published: March 29, 2026
Security Bulletin ID
SB2026032901
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) Memory leak (CVE-ID: CVE-2026-23399)
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper memory management in the nf_tables subsystem when handling stateful expressions in dynamic sets. A local user can trigger a memory leak by causing a failure during the cloning of stateful expressions, leading to unbounded memory consumption over time.
The issue occurs in the nft_dynset component when GFP_ATOMIC allocation fails, leaving the first stateful expression unreleased.
Remediation
Install update from vendor's website.