Linux Kernel up to 5.16.10 vmbus kobject_init_and_add memory leak

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.19.230/5.4.180/5.10.101/5.15.24/5.16.10. It has been rated as critical. This affects the function kobject_init_and_add of the component vmbus. The manipulation leads to memory leak. This vulnerability is referenced as CVE-2022-48775. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.19.230/5.4.180/5.10.101/5.15.24/5.16.10. It has been rated as critical. This issue affects the function kobject_init_and_add of the component vmbus. 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. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Fix memory leak in vmbus_add_channel_kobj kobject_init_and_add() takes reference even when it fails. According to the doc of kobject_init_and_add()： If this function returns an error, kobject_put() must be called to properly clean up the memory associated with the object. Fix memory leak by calling kobject_put().

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2022-48775 since 06/20/2024. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 209785 (EulerOS Virtualization 2.12.0 : kernel (EulerOS-SA-2024-2781)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.19.231, 5.4.181, 5.10.102, 5.15.25 or 5.16.11 eliminates this vulnerability. Applying the patch 417947891bd5/fe595759c2a4/91d8866ca552/c377e2ba78d3/92e25b637cd4/8bc69f86328e 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 (209785). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.19.230
• 5.4.180
• 5.10.101
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.16.0
• 5.16.1
• 5.16.2
• 5.16.3
• 5.16.4
• 5.16.5
• 5.16.6
• 5.16.7
• 5.16.8
• 5.16.9
• 5.16.10

License

• open-source

Website

• Vendor: https://www.kernel.org/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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