CVE-2023-4244 HIGH

CVE-2023-4244: Use-after-free in Linux kernel's netfilter: nf_tables component

Vendor Linux
Product Kernel
Weakness CWE-416
Published September 6, 2023
Last update February 13, 2025

CVSS base score

7.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability. We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.

Key dates

02Disclosure timeline

September 6, 2023 CVE published
February 13, 2025 Record updated