CVE-2026-63839: platform/x86: lenovo-wmi-helpers: Fix memory leak in lwmi_dev_evaluate_int()

Severity: unknown
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: 2026-07-19 · updated 2026-09-07

Description

In the Linux kernel, the following vulnerability has been resolved: platform/x86: lenovo-wmi-helpers: Fix memory leak in lwmi_dev_evaluate_int() lwmi_dev_evaluate_int() leaks output.pointer when retval == NULL (found by sashiko.dev [1]). Fix it by moving `ret_obj = output.pointer' outside of the `if (retval)' block so that it is always freed by the __free cleanup callback. No functional change intended.

Affected products

Linux kernel: 6.17 — fixed in 7.1

How to fix

Upgrade to a fixed version: Linux kernel 7.1. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/0c3887a134f191723b53e2a47e501b534c8723ee
https://git.kernel.org/stable/c/40a984dd0602e238ad893b167751620e751d1199
https://git.kernel.org/stable/c/ce493f9261cd3f4bffe2f72481d8c3ee01c559a3

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