CVE-2026-68356

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

watchdog: airoha: Prevent division by zero when clock frequency is zero

clk_get_rate() can return 0 when the clock provider is not properly

configured or the clock is unmanaged. The driver uses wdt_freq as a

divisor directly in airoha_wdt_probe() to compute max_timeout and in

airoha_wdt_get_timeleft() to compute the remaining time, which results

in a division by zero.

Add a check for wdt_freq == 0 in probe and return -EINVAL with

dev_err_probe() to prevent the division by zero and provide a

diagnostic message.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References