VULNERABILITY

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

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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
03/04/2024
Created
12/06/2024
Added
12/05/2024
Modified
03/10/2025

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.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2021-47098
  • RHSA-2024:9315

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