Linux Kernel up to 5.15.26/5.16.12 auxdisplay remove memory leak

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.15.26/5.16.12 and classified as critical. This issue affects the function remove of the component auxdisplay. Such manipulation leads to memory leak. This vulnerability is referenced as CVE-2022-48907. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.15.26/5.16.12. Affected by this issue is the function remove of the component auxdisplay. 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: auxdisplay: lcd2s: Fix memory leak in ->remove() Once allocated the struct lcd2s_data is never freed. Fix the memory leak by switching to devm_kzalloc().

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2022-48907 since 08/21/2024. Technical details are known, but there is no available exploit.

Upgrading to version 5.15.27 or 5.16.13 eliminates this vulnerability. Applying the patch 5d53cd33f425/3585ed5f9b11/898c0a15425a 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

• 5.15.0
• 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
• 5.15.25
• 5.15.26
• 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
• 5.16.11
• 5.16.12

License

• open-source

Website

• Vendor: https://www.kernel.org/

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