CVE-2026-68356
Low risk· EPSS 6%Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
In the Linux kernel, the airoha watchdog driver has a division by zero vulnerability. The clk_get_rate() function can return 0 when the clock provider is not properly configured or the clock is unmanaged. The driver uses wdt_freq as a divisor in airoha_wdt_probe() and airoha_wdt_get_timeleft(), leading to division by zero.
Risk Assessment
The vulnerability could lead to a system crash (kernel panic) or hang if the driver is used with an improperly configured clock.
Recommendation
Apply the patch that adds a check for wdt_freq == 0 in probe and returns -EINVAL with a diagnostic message. Update the kernel to a version containing this fix.
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Original NVD description (English source)
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.