Linux Kernel up to 6.5.5 rds rds_rdma_cm_event_handler_cmn null pointer dereference

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5.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.4.257/5.10.197/5.15.133/6.1.55/6.5.5. It has been declared as critical. Affected by this issue is the function rds_rdma_cm_event_handler_cmn of the component rds. Executing a manipulation can lead to null pointer dereference. This vulnerability is registered as CVE-2023-52573. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.4.257/5.10.197/5.15.133/6.1.55/6.5.5 (Operating System). This vulnerability affects the function rds_rdma_cm_event_handler_cmn of the component rds. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: net: rds: Fix possible NULL-pointer dereference In rds_rdma_cm_event_handler_cmn() check, if conn pointer exists before dereferencing it as rdma_set_service_type() argument Found by Linux Verification Center (linuxtesting.org) with SVACE.

The weakness was published 03/02/2024. The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2023-52573. There are known technical details, but no exploit is available.

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.

Upgrading to version 5.4.258, 5.10.198, 5.15.134, 6.1.56, 6.5.6 or 6.6 eliminates this vulnerability. Applying the patch 812da2a08dc5/f515112e8337/ea82139e6e35/51fa66024a5e/069ac51c37a6/f1d95df0f310 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (271767). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.4.257
• 5.10.197
• 5.15.133
• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.1.7
• 6.1.8
• 6.1.9
• 6.1.10
• 6.1.11
• 6.1.12
• 6.1.13
• 6.1.14
• 6.1.15
• 6.1.16
• 6.1.17
• 6.1.18
• 6.1.19
• 6.1.20
• 6.1.21
• 6.1.22
• 6.1.23
• 6.1.24
• 6.1.25
• 6.1.26
• 6.1.27
• 6.1.28
• 6.1.29
• 6.1.30
• 6.1.31
• 6.1.32
• 6.1.33
• 6.1.34
• 6.1.35
• 6.1.36
• 6.1.37
• 6.1.38
• 6.1.39
• 6.1.40
• 6.1.41
• 6.1.42
• 6.1.43
• 6.1.44
• 6.1.45
• 6.1.46
• 6.1.47
• 6.1.48
• 6.1.49
• 6.1.50
• 6.1.51
• 6.1.52
• 6.1.53
• 6.1.54
• 6.1.55
• 6.5.0
• 6.5.1
• 6.5.2
• 6.5.3
• 6.5.4
• 6.5.5

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: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

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: Partially

Availability: 🔍
Status: Not defined

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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.4.258/5.10.198/5.15.134/6.1.56/6.5.6/6.6
Patch: 812da2a08dc5/f515112e8337/ea82139e6e35/51fa66024a5e/069ac51c37a6/f1d95df0f310

Timelineinfo

03/02/2024 🔍
03/02/2024 +0 days 🔍
03/02/2024 +0 days 🔍
11/01/2025 +609 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-52573 (🔍)
GCVE (CVE): GCVE-0-2023-52573
GCVE (VulDB): GCVE-100-255520

Entryinfo

Created: 03/02/2024 23:31
Updated: 11/01/2025 20:48
Changes: 03/02/2024 23:31 (43), 04/04/2024 09:14 (15), 12/11/2024 21:17 (12), 11/01/2025 20:48 (2)
Complete: 🔍
Cache ID: 216::103

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