CVE-2026-68356

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux3cf67f3769b8227ca75ca7102180a2e270ee01aa < 8681e5addf7171602616e256a09057697dcc75caaffected
LinuxLinux3cf67f3769b8227ca75ca7102180a2e270ee01aa < 57c3f5bd5be008cd5b4ff6a45b7cb90f5ca45a37affected
LinuxLinux3cf67f3769b8227ca75ca7102180a2e270ee01aa < bcfcd7619f277842430d197556463b401b839ee9affected
LinuxLinux6.13affected
LinuxLinux0 < 6.13unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc5 <= *unaffected

Weaknesses

References