Linux Kernel up to 6.3.9 ksmbd fs/smb/server/smb2misc.c out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 6.3.9. This affects an unknown function of the file fs/smb/server/smb2misc.c of the component ksmbd. This manipulation causes out-of-bounds. The identification of this vulnerability is CVE-2023-38432. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.3.9 (Operating System) and classified as problematic. Affected by this vulnerability is an unknown functionality of the file fs/smb/server/smb2misc.c of the component ksmbd. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. The summary by CVE is:

An issue was discovered in the Linux kernel before 6.3.10. fs/smb/server/smb2misc.c in ksmbd does not validate the relationship between the command payload size and the RFC1002 length specification, leading to an out-of-bounds read.

The weakness was shared 07/18/2023. It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2023-38432 since 07/17/2023. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 247773 (Linux Distros Unpatched Vulnerability : CVE-2023-38432), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.3.10 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying a patch 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 (247773). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.2

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 247773
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-38432

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.3.10
Patch: git.kernel.org

Timelineinfo

07/17/2023 🔍
07/18/2023 +1 days 🔍
07/18/2023 +0 days 🔍
08/12/2025 +755 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-38432 (🔍)
GCVE (CVE): GCVE-0-2023-38432
GCVE (VulDB): GCVE-100-234319

Entryinfo

Created: 07/18/2023 09:41
Updated: 08/12/2025 00:53
Changes: 07/18/2023 09:41 (44), 08/06/2023 18:50 (11), 08/12/2025 00:53 (17)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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