CVE-2023-39189 MEDIUM

CVE-2023-39189: Kernel: netfilter: nftables out-of-bounds read in nf_osf_match_one()

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-125
Published October 9, 2023
Last update November 6, 2025
View on NVD All CVEs

CVSS base score

5.1/10
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:U/C:H/I:N/A:L

What the vulnerability does

01Description

A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.

Key dates

02Disclosure timeline

October 9, 2023 CVE published
November 6, 2025 Record updated