CVE-2023-42754

MEDIUM

Linux Kernel < 6.6 - NULL Pointer Dereference in IPv4 Stack via Socket Buffer Re-routing

Title source: llm
STIX 2.1

Description

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.

References (10)

Core 10
Core References
Exploit, Mailing List, Patch, Third Party Advisory
https://seclists.org/oss-sec/2023/q4/14
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2024:2394
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2024:2950
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2024:3138
Patch, Third Party Advisory vdb-entry x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2023-42754
Issue Tracking, Patch, Third Party Advisory issue-tracking x_refsource_redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2239845

Scores

CVSS v3 5.5
EPSS 0.0001
EPSS Percentile 1.2%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (7)
fedoraproject/fedora 37
fedoraproject/fedora 38
fedoraproject/fedora 39
linux/linux_kernel 6.6 rc1 (2 CPE variants)
linux/linux_kernel < 6.6
redhat/enterprise_linux 8.0
redhat/enterprise_linux 9.0
Published Oct 05, 2023
Tracked Since Feb 18, 2026