Linux Kernel TCP Subsystem fabrics-cmd.c out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel. This affects the function nvmet_execute_admin_connect/nvmet_execute_io_connect of the file drivers/nvme/target/fabrics-cmd.c of the component TCP Subsystem. Performing a manipulation results in out-of-bounds. This vulnerability was named CVE-2023-6121. The attack may be initiated remotely. In addition, an exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Linux Kernel (Operating System) (version now known). It has been classified as problematic. This affects the function nvmet_execute_admin_connect/nvmet_execute_io_connect of the file drivers/nvme/target/fabrics-cmd.c of the component TCP Subsystem. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality. The summary by CVE is:

An out-of-bounds read vulnerability was found in the NVMe-oF/TCP subsystem in the Linux kernel. This flaw allows a remote attacker to send a crafted TCP packet, triggering a heap-based buffer overflow that results in kmalloc data to be printed (and potentially leaked) to the kernel ring buffer (dmesg).

The weakness was presented 11/16/2023. It is possible to read the advisory at lore.kernel.org. This vulnerability is uniquely identified as CVE-2023-6121 since 11/14/2023. Technical details and a public exploit are known.

The exploit is shared for download at lore.kernel.org. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 240010 (TencentOS Server 2: kernel (TSSA-2024:1031)), 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 lore.kernel.org.

The vulnerability is also documented in the databases at Tenable (240010) and EUVD (EUVD-2023-58376). 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: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔍

CNA Base Score: 4.3
CNA Vector (Red Hat, Inc.): 🔍

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: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 240010
Nessus Name: TencentOS Server 2: kernel (TSSA-2024:1031)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: lore.kernel.org

Timelineinfo

11/14/2023 🔍
11/16/2023 +2 days 🔍
11/16/2023 +0 days 🔍
07/24/2025 +616 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: lore.kernel.org
Status: Confirmed

CVE: CVE-2023-6121 (🔍)
GCVE (CVE): GCVE-0-2023-6121
GCVE (VulDB): GCVE-100-245643
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 11/16/2023 15:54
Updated: 07/24/2025 02:37
Changes: 11/16/2023 15:54 (54), 12/12/2023 17:57 (1), 09/14/2024 06:45 (26), 06/17/2025 15:53 (2), 07/24/2025 02:37 (1)
Complete: 🔍
Cache ID: 216::103

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

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