#VU124663 Memory leak in Linux kernel - CVE-2026-23399
Published: March 29, 2026
Vulnerability identifier: #VU124663
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-23399
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
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 security update from vendor's repository.