Linux Kernel up to 6.6.34/6.9.5 devm_cxl_add_region memory leak

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 6.6.34/6.9.5. The impacted element is the function devm_cxl_add_region. The manipulation results in memory leak. This vulnerability is cataloged as CVE-2024-40936. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.6.34/6.9.5. Affected is the function devm_cxl_add_region. The manipulation with an unknown input leads to a memory leak vulnerability. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: cxl/region: Fix memregion leaks in devm_cxl_add_region() Move the mode verification to __create_region() before allocating the memregion to avoid the memregion leaks.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2024-40936 since 07/12/2024. There are known technical details, but no exploit is available.

Upgrading to version 6.6.35 or 6.9.6 eliminates this vulnerability. Applying the patch d8316838aa06/bbb5d8746381/49ba7b515c4c 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

• 6.6.0
• 6.6.1
• 6.6.2
• 6.6.3
• 6.6.4
• 6.6.5
• 6.6.6
• 6.6.7
• 6.6.8
• 6.6.9
• 6.6.10
• 6.6.11
• 6.6.12
• 6.6.13
• 6.6.14
• 6.6.15
• 6.6.16
• 6.6.17
• 6.6.18
• 6.6.19
• 6.6.20
• 6.6.21
• 6.6.22
• 6.6.23
• 6.6.24
• 6.6.25
• 6.6.26
• 6.6.27
• 6.6.28
• 6.6.29
• 6.6.30
• 6.6.31
• 6.6.32
• 6.6.33
• 6.6.34
• 6.9.0
• 6.9.1
• 6.9.2
• 6.9.3
• 6.9.4
• 6.9.5

License

• open-source

Website

• Vendor: https://www.kernel.org/

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