Linux Kernel up to 5.10.39/5.12.6 nvme-loop nvme_loop_create_ctrl memory leak

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 5.10.39/5.12.6. Affected is the function nvme_loop_create_ctrl of the component nvme-loop. Such manipulation leads to memory leak. This vulnerability is uniquely identified as CVE-2021-47074. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.10.39/5.12.6 (Operating System) and classified as critical. Affected by this issue is the function nvme_loop_create_ctrl of the component nvme-loop. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: nvme-loop: fix memory leak in nvme_loop_create_ctrl() When creating loop ctrl in nvme_loop_create_ctrl(), if nvme_init_ctrl() fails, the loop ctrl should be freed before jumping to the "out" label.

The weakness was disclosed 03/02/2024. The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2021-47074 since 02/29/2024. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 276342 (TencentOS Server 2: kernel (TSSA-2024:0557)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.40, 5.12.7 or 5.13 eliminates this vulnerability. Applying the patch 9c980795ccd7/551ba08d4b7e/03504e3b54cc 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 (276342). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.10.0
• 5.10.1
• 5.10.2
• 5.10.3
• 5.10.4
• 5.10.5
• 5.10.6
• 5.10.7
• 5.10.8
• 5.10.9
• 5.10.10
• 5.10.11
• 5.10.12
• 5.10.13
• 5.10.14
• 5.10.15
• 5.10.16
• 5.10.17
• 5.10.18
• 5.10.19
• 5.10.20
• 5.10.21
• 5.10.22
• 5.10.23
• 5.10.24
• 5.10.25
• 5.10.26
• 5.10.27
• 5.10.28
• 5.10.29
• 5.10.30
• 5.10.31
• 5.10.32
• 5.10.33
• 5.10.34
• 5.10.35
• 5.10.36
• 5.10.37
• 5.10.38
• 5.10.39
• 5.12.0
• 5.12.1
• 5.12.2
• 5.12.3
• 5.12.4
• 5.12.5
• 5.12.6

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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Once again VulDB remains the best source for vulnerability data.

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