linux-kernel - Re: [PATCH] ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <87bjqemr3s.wl-tiwai@suse.de>
Date: Mon, 23 Jun 2025 17:09:59 +0200
From: Takashi Iwai <tiwai@...e.de>
To: Youngjun Lee <yjjuny.lee@...sung.com>
Cc: Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()

On Mon, 23 Jun 2025 13:05:25 +0200,
Youngjun Lee wrote:
> 
> 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.
> 
> Signed-off-by: Youngjun Lee <yjjuny.lee@...sung.com>

Applied now.  Thanks.


Takashi