vulnerability

Red Hat: CVE-2021-47098: kernel: hwmon: (lm90) Prevent integer overflow/underflow in hysteresis calculations (Multiple Advisories)

Severity
6
CVSS
(AV:L/AC:L/Au:M/C:C/I:N/A:C)
Published
Mar 4, 2024
Added
Dec 5, 2024
Modified
Aug 11, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

hwmon: (lm90) Prevent integer overflow/underflow in hysteresis calculations

Commit b50aa49638c7 ("hwmon: (lm90) Prevent integer underflows of
temperature calculations") addressed a number of underflow situations
when writing temperature limits. However, it missed one situation, seen
when an attempt is made to set the hysteresis value to MAX_LONG and the
critical temperature limit is negative.

Use clamp_val() when setting the hysteresis temperature to ensure that
the provided value can never overflow or underflow.

Solutions

no-fix-redhat-rpm-packageredhat-upgrade-kernelredhat-upgrade-kernel-rt
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