Linux Kernel 5.10/6.1/6.5.rc7 Netfilter Subsystem ip_set_core.c __ip_set_put race condition

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel 5.10/6.1/6.5.rc7. The affected element is the function __ip_set_put of the file net/netfilter/ipset/ip_set_core.c of the component Netfilter Subsystem. The manipulation leads to race condition. This vulnerability is referenced as CVE-2023-42756. The attack can only be performed from a local environment. Furthermore, an exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Linux Kernel 5.10/6.1/6.5.rc7 (Operating System). It has been rated as critical. This issue affects the function __ip_set_put of the file net/netfilter/ipset/ip_set_core.c of the component Netfilter Subsystem. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is availability.

The weakness was published 09/28/2023. The advisory is shared at seclists.org. The identification of this vulnerability is CVE-2023-42756 since 09/13/2023. Technical details as well as a public exploit are known.

The exploit is available at seclists.org. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 271767 (Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2025-112 (ALASKERNEL-5.4-2025-112)), 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 (271767) and EUVD (EUVD-2023-47188). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.7
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CNA Base Score: 4.4
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
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: 🔍

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Nessus ID: 271767
Nessus Name: Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2025-112 (ALASKERNEL-5.4-2025-112)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

09/13/2023 🔍
09/28/2023 +15 days 🔍
09/28/2023 +0 days 🔍
10/29/2025 +762 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: DLA 3623-1
Status: Confirmed

CVE: CVE-2023-42756 (🔍)
GCVE (CVE): GCVE-0-2023-42756
GCVE (VulDB): GCVE-100-240785
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/28/2023 07:49
Updated: 10/29/2025 04:25
Changes: 09/28/2023 07:49 (45), 10/21/2023 14:18 (2), 10/21/2023 14:23 (21), 09/16/2024 17:30 (17), 07/26/2025 03:50 (3), 10/29/2025 04:25 (3)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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