CVE-2023-4015 HIGH

CVE-2023-4015: 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. On an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used. We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.

Key dates

02Disclosure timeline

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