USB Driver Vulnerability in Linux Kernel Affecting Device Resource Management

CVE-2026-31672

What is CVE-2026-31672?

The identified vulnerability in the Linux kernel pertains to the improper lifetime management of device resources linked to USB interfaces. When USB drivers bind to USB interfaces, any resources managed by these drivers must have their lifespan associated with the interface, not merely the parent USB device. This critical adjustment prevents potential memory leaks that can occur if drivers are unbound without the physical disconnection of their devices, such as in scenarios involving probe deferral or configuration alterations. An essential fix involves ensuring that the USB anchor's lifetime is accurately maintained and released upon driver unbinding, thereby significantly enhancing stability and reliability.

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