CVE-2025-38249 Information

Jul 10, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()

In snd_usb_get_audioformat_uac3() the length value returned from snd_usb_ctl_msg() is used directly for memory allocation without validation. This length is controlled by the USB device.

The allocated buffer is cast to a uac3_cluster_header_descriptor and its fields are accessed without verifying that the buffer is large enough. If the device returns a smaller than expected length this leads to an out-of-bounds read.

Add a length check to ensure the buffer is large enough for uac3_cluster_header_descriptor.

Reference

https://git.kernel.org/stable/c/0ee87c2814deb5e42921281116ac3abcb326880b https://git.kernel.org/stable/c/11e740dc1a2c8590eb7074b5c4ab921bb6224c36 https://git.kernel.org/stable/c/6eb211788e1370af52a245d4d7da35c374c7b401 https://git.kernel.org/stable/c/74fcb3852a2f579151ce80b9ed96cd916ba0d5d8 https://git.kernel.org/stable/c/fb4e2a6e8f28a3c0ad382e363aeb9cd822007b8a

CNNVD-202507-1290 (Published: 2025-07-09)

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