CVE-2025-38249

Published: July 10, 2025Last modified: July 10, 2025

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.

Status

References

• https://git.kernel.org/stable/c/0ee87c2814deb5e42921281116ac3abcb326880b
• https://git.kernel.org/stable/c/11e740dc1a2c8590eb7074b5c4ab921bb6224c36
• https://git.kernel.org/stable/c/24ff7d465c4284529bbfa207757bffb6f44b6403
• https://git.kernel.org/stable/c/2dc1c3edf67abd30c757f8054a5da61927cdda21
• https://git.kernel.org/stable/c/6eb211788e1370af52a245d4d7da35c374c7b401
• https://git.kernel.org/stable/c/74fcb3852a2f579151ce80b9ed96cd916ba0d5d8
• https://git.kernel.org/stable/c/c3fb926abe90d86f5e3055e0035f04d9892a118b
• https://git.kernel.org/stable/c/fb4e2a6e8f28a3c0ad382e363aeb9cd822007b8a