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CVE-2023-52520: platform/x86: think-lmi: Fix reference leak

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-03-02 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: platform/x86: think-lmi: Fix reference leak If a duplicate attribute is found using kset_find_obj(), a reference to that attribute is returned which needs to be disposed accordingly using kobject_put(). Move the setting name validation into a separate function to allow for this change without having to duplicate the cleanup code for this setting. As a side note, a very similar bug was fixed in commit 7295a996fdab ("platform/x86: dell-sysman: Fix reference leak"), so it seems that the bug was copied from that driver. Compile-tested only.

Affected products

• Linux kernel: from 5.14 before 5.15.136; from 5.16 before 6.1.59; from 6.2 before 6.5.8; 6.6-rc1, 6.6-rc2, 6.6-rc3, 6.6-rc4 — fixed in 5.15.136, 6.1.59, 6.5.8

How to fix

Upgrade to a fixed version: Linux kernel 5.15.136, 6.1.59, 6.5.8. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/124cf0ea4b82e1444ec8c7420af4e7db5558c293
• https://git.kernel.org/stable/c/528ab3e605cabf2f9c9bd5944d3bfe15f6e94f81
• https://git.kernel.org/stable/c/af21c9119a37cecb7ff27ce0c2f3cf721e9d0ec4
• https://git.kernel.org/stable/c/c6e3023579de8d33256771ac0745239029e81106
• https://git.kernel.org/stable/c/124cf0ea4b82e1444ec8c7420af4e7db5558c293
• https://git.kernel.org/stable/c/528ab3e605cabf2f9c9bd5944d3bfe15f6e94f81
• https://git.kernel.org/stable/c/af21c9119a37cecb7ff27ce0c2f3cf721e9d0ec4
• https://git.kernel.org/stable/c/c6e3023579de8d33256771ac0745239029e81106

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