SB20260812163 - Division by zero in Linux kernel watchdog driver
Published: August 12, 2026
Security Bulletin ID
SB20260812163
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Division by zero (CVE-ID: CVE-2026-68356)
CWE-ID: CWE-369 - Divide By Zero
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 division by zero in the airoha watchdog driver when handling a zero clock frequency value during device probe or time-left calculation. A local user can trigger use of an improperly configured or unmanaged clock to cause a denial of service.
The issue occurs when clk_get_rate() returns 0.
Remediation
Install update from vendor's website.