CVE-2025-21992: 
Linux Kernel vulnerability analysis and mitigation

CVE-2025-21992 was discovered in the Linux kernel, specifically affecting the HID sensor interface of the HP 5MP Camera (USB ID 0408:5473). The vulnerability was disclosed on April 2, 2025, and involves a non-functional sensor interface that is reported but not actually implemented (NVD).

The vulnerability occurs when the HP 5MP Camera reports a HID sensor interface that is not actually implemented. When attempting to access this non-functional sensor via iio_info, the system hangs as runtime PM tries to wake up an unresponsive sensor. The issue manifests with error messages showing invalid report latency attributes (ffffffff:ffffffff) and common attributes (5:1, 2:1, 3:1 ffffffff:ffffffff) (NVD).

When exploited, this vulnerability causes system hangs due to runtime Power Management attempting to wake up an unresponsive sensor. This results in a denial of service condition affecting system stability (NVD).

The vulnerability has been resolved by adding the device to the HID ignore list since the sensor interface is non-functional by design and should not be exposed to userspace. The fix has been included in the Linux kernel update, with Debian distributing the fix in version 6.1.133-1 (Debian Security).