Linux Kernel up to 6.2.11 sctp_ifwdtsn_skip null pointer dereference

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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.2.11. This impacts the function sctp_ifwdtsn_skip. Such manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2023-53372. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.2.11. It has been rated as critical. Affected by this issue is the function sctp_ifwdtsn_skip. 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. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: sctp: fix a potential overflow in sctp_ifwdtsn_skip Currently, when traversing ifwdtsn skips with _sctp_walk_ifwdtsn, it only checks the pos against the end of the chunk. However, the data left for the last pos may be < sizeof(struct sctp_ifwdtsn_skip), and dereference it as struct sctp_ifwdtsn_skip may cause coverflow. This patch fixes it by checking the pos against "the end of the chunk - sizeof(struct sctp_ifwdtsn_skip)" in sctp_ifwdtsn_skip, similar to sctp_fwdtsn_skip.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2023-53372 since 09/17/2025. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 265597 (Linux Distros Unpatched Vulnerability : CVE-2023-53372), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.19.281, 5.4.241, 5.10.178, 5.15.108, 6.1.25 or 6.2.12 eliminates this vulnerability. Applying the patch 4fbd094d4131a10d06a45d64158567052a35b3f4/ad831a7079c99c01e801764b53bc9997c2e9c0f7/79b28f42214a3d0d6a8c514db3602260bd5d6cb5/6109f5b13ce3e3e537db6f18976ec0e9118d1c6f/5c9367ac5a22d71841bcd00130f9146c9b227d57/ad988e9b5ff04607e624a459209e8c2d0c15fc73/32832a2caf82663870126c5186cf8f86c8b2a649 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 databases at Tenable (265597) and CERT Bund (WID-SEC-2025-2092). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

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

NVD Base Score: 7.8
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: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 265597
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53372

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.19.281/5.4.241/5.10.178/5.15.108/6.1.25/6.2.12
Patch: 4fbd094d4131a10d06a45d64158567052a35b3f4/ad831a7079c99c01e801764b53bc9997c2e9c0f7/79b28f42214a3d0d6a8c514db3602260bd5d6cb5/6109f5b13ce3e3e537db6f18976ec0e9118d1c6f/5c9367ac5a22d71841bcd00130f9146c9b227d57/ad988e9b5ff04607e624a459209e8c2d0c15fc73/32832a2caf82663870126c5186cf8f86c8b2a649

Timelineinfo

09/17/2025 CVE reserved
09/18/2025 +1 days Advisory disclosed
09/18/2025 +0 days VulDB entry created
12/12/2025 +85 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53372 (🔒)
GCVE (CVE): GCVE-0-2023-53372
GCVE (VulDB): GCVE-100-324872
CERT Bund: WID-SEC-2025-2092 - Linux Kernel: Mehrere Schwachstellen erm&ouml;glichen Denial of Service

Entryinfo

Created: 09/18/2025 16:36
Updated: 12/12/2025 18:25
Changes: 09/18/2025 16:36 (58), 09/20/2025 04:02 (7), 09/21/2025 23:19 (2), 11/29/2025 15:09 (1), 12/12/2025 18:25 (11)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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