SB20260816163 - Out-of-bounds read in Linux kernel hwmon driver

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Main Vulnerability Database SB20260816163

SB20260816163 - Out-of-bounds read in Linux kernel hwmon driver

Published: August 16, 2026

Security Bulletin ID SB20260816163
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) Out-of-bounds read (CVE-ID: CVE-2026-74549)

CWE-ID: CWE-125 - Out-of-bounds read

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 out-of-bounds read in nct6775_update_pwm() in the nct6775-core hwmon driver when iterating over pwm channels for nct6116 weight-control registers. A local user can trigger access to unsupported weight registers to cause a denial of service.

The issue affects nct6116 configurations where bits 3 or 4 of has_pwm are set, causing out-of-bounds values to be used as hardware register addresses for subsequent read and write operations.


Remediation

Install update from vendor's website.

References