SB20261023133 - Improper input validation in Linux kernel regulator driver

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20261023133

SB20261023133 - Improper input validation in Linux kernel regulator driver

Published: October 23, 2026

Security Bulletin ID SB20261023133
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-2026-99022)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to cause a denial of service by triggering a board reboot.

The vulnerability exists due to improper validation of readable register addresses in the Linux kernel LTC3676 regulator driver when processing register dumps through regmap debugfs. A local privileged user can read /sys/kernel/debug/regmap/2-003c/registers to trigger access to the write-only HRST register, causing a hard reset of the chip and rebooting the board.

The CLIRQ register at address 0x1f is also incorrectly treated as readable; reading it triggers the interrupt-clear command.


Remediation

Install update from vendor's website.

References