CVE-2025-71114

A boot hang vulnerability was found in the Linux kernel's VIA watchdog timer driver. When allocating a MMIO resource for the watchdog control register, the driver fails to assign a name to the resource. This creates an invalid "<BAD>" entry in the kernel resource tree under /proc/iomem, which can cause subsequent resource lookups and conflict checks to fail, leading to a system hang during boot.

This vulnerability affects systems with VIA chipsets that use the via_wdt watchdog driver. The boot hang occurs during early system initialization when the unnamed resource causes resource management failures. Systems without VIA hardware or with the via_wdt module not loaded are not affected.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this issue, prevent the via_wdt module from being loaded if VIA watchdog timer functionality is not required. See https://access.redhat.com/solutions/41278 for instructions on how to blacklist a kernel module.