Bug 2376068 (CVE-2025-38142)

Summary: CVE-2025-38142 kernel: hwmon: (asus-ec-sensors) check sensor index in read_string()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-07-03 09:03:21 UTC 
In the Linux kernel, the following vulnerability has been resolved:

hwmon: (asus-ec-sensors) check sensor index in read_string()

Prevent a potential invalid memory access when the requested sensor
is not found.

find_ec_sensor_index() may return a negative value (e.g. -ENOENT),
but its result was used without checking, which could lead to
undefined behavior when passed to get_sensor_info().

Add a proper check to return -EINVAL if sensor_index is negative.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

[groeck: Return error code returned from find_ec_sensor_index]
Comment 1 Avinash Hanwate 2025-07-03 17:14:47 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025070334-CVE-2025-38142-a038@gregkh/T