CVE-2023-39192 MEDIUM

CVE-2023-39192: Kernel: netfilter: xtables out-of-bounds read in u32_match_it()

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-125
Published October 9, 2023
Last update November 8, 2025

CVSS base score

6.7/10
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

A flaw was found in the Netfilter subsystem in the Linux kernel. The xt_u32 module did not validate the fields in the xt_u32 structure. This flaw allows a local privileged attacker to trigger an out-of-bounds read by setting the size fields with a value beyond the array boundaries, leading to a crash or information disclosure.

Key dates

02Disclosure timeline

October 9, 2023 CVE published
November 8, 2025 Record updated