Linux Kernel up to 5.15.110/6.1.27/6.2.14/6.3.1 ksmbd smb2_get_info_filesystem null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.15.110/6.1.27/6.2.14/6.3.1. It has been classified as critical. This issue affects the function smb2_get_info_filesystem of the component ksmbd. This manipulation causes null pointer dereference. The identification of this vulnerability is CVE-2023-53399. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.15.110/6.1.27/6.2.14/6.3.1. It has been declared as critical. Affected by this vulnerability is the function smb2_get_info_filesystem of the component ksmbd. 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. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix NULL pointer dereference in smb2_get_info_filesystem() If share is , share->path is NULL and it cause NULL pointer dereference issue.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2023-53399 since 09/17/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 265554 (Linux Distros Unpatched Vulnerability : CVE-2023-53399), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.15.111, 6.1.28, 6.2.15 or 6.3.2 eliminates this vulnerability. Applying the patch 227eb2689b44d0d60da3839b146983e73435924c/a70751dd7b60eab025e97e19b6b2477c6eaf2bbb/b35f6c031b87d9e51f141ff6de0ea59756a8e313/1636e09779f83e10e6ed57d91ef94abcefdd206b/3ac00a2ab69b34189942afa9e862d5170cdcb018 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 (265554) and CERT Bund (WID-SEC-2025-2092). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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

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Name

Version

License

Website

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

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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: 265554
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53399

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.15.111/6.1.28/6.2.15/6.3.2
Patch: 227eb2689b44d0d60da3839b146983e73435924c/a70751dd7b60eab025e97e19b6b2477c6eaf2bbb/b35f6c031b87d9e51f141ff6de0ea59756a8e313/1636e09779f83e10e6ed57d91ef94abcefdd206b/3ac00a2ab69b34189942afa9e862d5170cdcb018

Timelineinfo

09/17/2025 CVE reserved
09/18/2025 +1 days Advisory disclosed
09/18/2025 +0 days VulDB entry created
12/11/2025 +84 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53399 (🔒)
GCVE (CVE): GCVE-0-2023-53399
GCVE (VulDB): GCVE-100-324889
CERT Bund: WID-SEC-2025-2092 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 09/18/2025 16:41
Updated: 12/11/2025 23:37
Changes: 09/18/2025 16:41 (59), 09/20/2025 16:19 (7), 09/20/2025 23:51 (2), 11/29/2025 17:40 (1), 12/11/2025 23:37 (10)
Complete: 🔍
Cache ID: 216::103

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

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