Linux Kernel up to 5.10.39/5.12.6 nvmet nvmet_alloc_ctrl memory leak

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 5.10.39/5.12.6. Affected by this issue is the function nvmet_alloc_ctrl of the component nvmet. Executing a manipulation can lead to memory leak. The identification of this vulnerability is CVE-2021-47075. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.10.39/5.12.6 (Operating System). It has been declared as critical. This vulnerability affects the function nvmet_alloc_ctrl of the component nvmet. 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:

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix memory leak in nvmet_alloc_ctrl() When creating ctrl in nvmet_alloc_ctrl(), if the cntlid_min is larger than cntlid_max of the subsystem, and jumps to the "out_free_changed_ns_list" label, but the ctrl->sqs lack of be freed. Fix this by jumping to the "out_free_sqs" label.

The weakness was shared 03/02/2024. The advisory is available at git.kernel.org. This vulnerability was named CVE-2021-47075 since 02/29/2024. Technical details are known, but there is no available exploit.

Upgrading to version 5.10.40, 5.12.7 or 5.13 eliminates this vulnerability. Applying the patch 4720f29acb3f/afb680ed7ecb/fec356a61aa3 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.

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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/

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