VDB-241116 · CVE-2023-42754 · EUVD-2023-47186

Linux Kernel 6.2.16 IPv4 net/ipv4/route.c ipv4_send_dest_unreach null pointer dereference

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.0	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel 6.2.16. The impacted element is the function ipv4_send_dest_unreach of the file net/ipv4/route.c of the component IPv4 Handler. The manipulation results in null pointer dereference. This vulnerability is identified as CVE-2023-42754. The attack is only possible with local access. Additionally, an exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Linux Kernel 6.2.16 (Operating System). It has been classified as problematic. Affected is the function ipv4_send_dest_unreach of the file net/ipv4/route.c of the component IPv4 Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability.

The weakness was released 10/03/2023. The advisory is shared for download at seclists.org. This vulnerability is traded as CVE-2023-42754 since 09/13/2023. Technical details and a public exploit are known.

The exploit is shared for download at seclists.org. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 239807 (TencentOS Server 3: kernel (TSSA-2024:0145)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

The vulnerability is also documented in the databases at Tenable (239807) and EUVD (EUVD-2023-47186). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

6.2.16

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.4
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 5.5
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 239807
Nessus Name: TencentOS Server 3: kernel (TSSA-2024:0145)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

09/13/2023 🔍
10/03/2023 +20 days 🔍
10/03/2023 +0 days 🔍
07/24/2025 +659 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2023-50bd7c9c12
Status: Confirmed

CVE: CVE-2023-42754 (🔍)
GCVE (CVE): GCVE-0-2023-42754
GCVE (VulDB): GCVE-100-241116
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/03/2023 08:08
Updated: 07/24/2025 00:37
Changes: 10/03/2023 08:08 (45), 10/23/2023 14:56 (2), 10/23/2023 15:00 (12), 09/14/2024 00:15 (28), 06/20/2025 04:36 (4), 07/24/2025 00:37 (2)
Complete: 🔍
Cache ID: 216::103