SB20260816161 - Improper input validation in Linux kernel hwmon driver

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Main Vulnerability Database SB20260816161

SB20260816161 - Improper input validation in Linux kernel hwmon driver

Published: August 16, 2026

Security Bulletin ID SB20260816161
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper input validation (CVE-ID: CVE-2026-74547)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper input validation in the adt7470 hwmon driver sysfs interface and background update thread when processing user-supplied sysfs configuration values. A local user can set 'auto_update_interval' to 0 and cause the update thread to enter a tight busy-loop and flood the I2C bus to cause a denial of service.

The issue requires access to sysfs attributes, and concurrent or prior configuration of 'num_temp_sensors' to 0 triggers the zero-delay temperature read path.


Remediation

Install update from vendor's website.

References