USB Audio Device Vulnerability in Linux Kernel
CVE-2025-40085
What is CVE-2025-40085?
A vulnerability in the Linux kernel related to ALSA's handling of USB audio devices can cause a NULL pointer dereference during the attempt to register an invalid USB audio device. The issue arises in the try_to_register_card function, where the return value of usb_ifnum_to_if() is incorrectly used without prior validation. This oversight could lead to system crashes or unexpected behavior, highlighting the need for strict validation checks before interfacing with USB components.
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Affected Version(s)
Linux 28787ff9fbeaf57684eb64cc33e2ec8ceedf21b5 < 736159f7b296d7a95f7208eb4799639b1f8b16a0
Linux 39efc9c8a973ddff5918191525d1679d0fb368ea < 8d19a7ab28c7b9c207db5c5282afa8cc8595bcdb
Linux 39efc9c8a973ddff5918191525d1679d0fb368ea < 576312eb436326b44b7010f4d9ae2b698df075ea