CVE-2023-42754 MEDIUM

CVE-2023-42754: Kernel: ipv4: null pointer dereference in ipv4_send_dest_unreach()

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-476
Published October 5, 2023
Last update November 6, 2025
View on NVD All CVEs

CVSS base score

5.5/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

A NULL pointer dereference flaw was found in the Linux kernel ipv4 stack. The socket buffer (skb) was assumed to be associated with a device before calling __ip_options_compile, which is not always the case if the skb is re-routed by ipvs. This issue may allow a local user with CAP_NET_ADMIN privileges to crash the system.

Key dates

02Disclosure timeline

October 5, 2023 CVE published
November 6, 2025 Record updated