CVE-2025-38281: 
Linux Ubuntu vulnerability analysis and mitigation

In the Linux kernel, a vulnerability was discovered related to NULL pointer handling in the mt7996thermalinit function. The issue arises when devmkasprintf() returns a NULL pointer on failure, but this returned value is not properly checked in mt7996thermal_init(). The vulnerability was disclosed on July 10, 2025 (NVD).

The vulnerability exists in the Linux kernel's WiFi driver component, specifically in the mt76 subsystem for the mt7996 device. The core issue is a missing NULL pointer check after a devmkasprintf() call in the mt7996thermalinit() function. When devmkasprintf() fails, it returns NULL, which can lead to a kernel NULL pointer dereference error if not properly validated (NVD).

If exploited, this vulnerability can lead to a kernel NULL pointer dereference, which typically results in a system crash or denial of service condition. This affects the stability and availability of systems using the affected Linux kernel versions with the mt7996 WiFi driver (NVD).

The vulnerability has been resolved by adding a NULL check in mt7996thermalinit() to properly handle kernel NULL pointer dereference errors. Users should update to the patched kernel version that includes this fix (NVD).