Linux Kernel up to 5.19.1 fs/ksmbd/smb2pdu.c smb2_handle_negotiate memory leak

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

Summaryinfo

A vulnerability described as problematic has been identified in Linux Kernel up to 5.19.1. This impacts the function smb2_handle_negotiate of the file fs/ksmbd/smb2pdu.c. Executing a manipulation can lead to memory leak. This vulnerability is handled as CVE-2022-47941. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 5.19.1 (Operating System). This vulnerability affects the function smb2_handle_negotiate of the file fs/ksmbd/smb2pdu.c. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. CVE summarizes:

An issue was discovered in ksmbd in the Linux kernel before 5.19.2. fs/ksmbd/smb2pdu.c omits a kfree call in certain smb2_handle_negotiate error conditions, aka a memory leak.

The weakness was released 12/23/2022. The advisory is shared for download at openwall.com. This vulnerability was named CVE-2022-47941 since 12/23/2022. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 239841 (TencentOS Server 4: kernel (TSSA-2024:0960)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.19.2 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 (239841). Once again VulDB remains the best source for vulnerability data.

Productinfo

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
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: 239841
Nessus Name: TencentOS Server 4: kernel (TSSA-2024:0960)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.19.2
Patch: git.kernel.org

Timelineinfo

12/23/2022 🔍
12/23/2022 +0 days 🔍
12/23/2022 +0 days 🔍
06/19/2025 +909 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: aa7253c2393f6dcd6a1468b0792f6da76edad917
Status: Confirmed

CVE: CVE-2022-47941 (🔍)
GCVE (CVE): GCVE-0-2022-47941
GCVE (VulDB): GCVE-100-216676

Entryinfo

Created: 12/23/2022 20:37
Updated: 06/19/2025 20:57
Changes: 12/23/2022 20:37 (44), 01/23/2023 13:01 (1), 01/23/2023 13:08 (11), 04/15/2025 17:01 (16), 06/19/2025 20:57 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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