Linux Kernel SCTP Network Protocol net/sctp/stream_sched.c null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel. This vulnerability affects unknown code of the file net/sctp/stream_sched.c of the component SCTP Network Protocol Handler. The manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2023-2177. The attack can only be performed from a local environment. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel (Operating System) (affected version unknown). This issue affects an unknown functionality of the file net/sctp/stream_sched.c of the component SCTP Network Protocol Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

A null pointer dereference issue was found in the sctp network protocol in net/sctp/stream_sched.c in Linux Kernel. If stream_in allocation is failed, stream_out is freed which would further be accessed. A local user could use this flaw to crash the system or potentially cause a denial of service.

The weakness was published 04/21/2023. It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2023-2177 since 04/19/2023. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 233373 (Amazon Linux 2 : kernel (ALASKERNEL-5.10-2025-086)), 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 (233373) and EUVD (EUVD-2023-33694). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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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: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 233373
Nessus Name: Amazon Linux 2 : kernel (ALASKERNEL-5.10-2025-086)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

04/19/2023 🔍
04/21/2023 +2 days 🔍
04/21/2023 +0 days 🔍
12/17/2025 +971 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-2177 (🔍)
GCVE (CVE): GCVE-0-2023-2177
GCVE (VulDB): GCVE-100-226955
EUVD: 🔍

Entryinfo

Created: 04/21/2023 07:55
Updated: 12/17/2025 20:22
Changes: 04/21/2023 07:55 (41), 05/15/2023 07:22 (10), 03/27/2025 22:37 (17), 12/17/2025 20:22 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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