CVE-2023-4147 HIGH

CVE-2023-4147: Kernel: netfilter: nf_tables_newrule when adding a rule with nfta_rule_chain_id leads to use-after-free

Vendor Red Hat
Product Red Hat Enterprise Linux 9
Weakness CWE-416
Published August 7, 2023
Last update February 25, 2026
View on NVD All CVEs

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 flaw was found in the Linux kernel’s Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system.

Key dates

02Disclosure timeline

August 7, 2023 CVE published
February 25, 2026 Record updated