Linux Kernel up to 6.18.26/7.0.3 versalnet mc_probe memory leak

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.18.26/7.0.3. Affected by this vulnerability is the function mc_probe of the component versalnet. Performing a manipulation results in memory leak. This vulnerability is reported as CVE-2026-46030. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.18.26/7.0.3. This affects the function mc_probe of the component versalnet. 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. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: EDAC/versalnet: Fix device_node leak in mc_probe() of_parse_phandle() returns a device_node reference that must be released with of_node_put(). The original code never freed r5_core_node on any exit path, causing a memory leak. Fix this by using the automatic cleanup attribute __free(device_node) which ensures of_node_put() is called when the variable goes out of scope.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-46030 since 05/13/2026. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.18.27, 7.0.4 or 7.1-rc1 eliminates this vulnerability. Applying the patch b6e61356ad24987be40bf25369d22dd8dd00a513/17e136993b2b5111d1ee1c57bbd188ae0bb0e128/5c709b376460ff322580c41600e31c02f7cc0307 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

• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8
• 6.18.9
• 6.18.10
• 6.18.11
• 6.18.12
• 6.18.13
• 6.18.14
• 6.18.15
• 6.18.16
• 6.18.17
• 6.18.18
• 6.18.19
• 6.18.20
• 6.18.21
• 6.18.22
• 6.18.23
• 6.18.24
• 6.18.25
• 6.18.26
• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

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