Unnamed repository; edit this file 'description' to name the repository. http://git-test.landau.one/pub/scm/linux/kernel/git/stable/linux-stable.git/atom/drivers/usb/gadget/function?h=master 2026-10-01T05:12:43Z 2026-10-01T05:12:43Z Liu Chao liuc63@xiaopeng.com 2026-09-21T07:25:51Z urn:sha1:9062d50e75c24dc7911be05c9b1719b3b256af15 generic_set_cmd() and generic_get_cmd() use the low nibble of ctrl->bRequest as an index into con->data[]: u8 cmd = (ctrl->bRequest & 0x0F); /* 0 .. 15 */ ... con->data[cmd] = value; /* OOB when cmd >= 5 */ struct usb_audio_control (include/linux/usb/audio.h) declares data as a 5-element array, so indices 5 through 15 write (or read) up to 44 bytes past the end of the array on the heap. A malicious USB host can craft a class-specific SET_CUR / GET_CUR request with an arbitrary bRequest value, triggering the out-of-bounds access from an IRQ completion handler with no further preconditions. Add an ARRAY_SIZE() guard to both functions. Fixes: c47d7b09891a ("USB: audio: add USB audio class definitions") Cc: stable <stable@kernel.org> Reviewed-by: Weibin Liu <liuwb@xiaopeng.com> Signed-off-by: Liu Chao <liuc63@xiaopeng.com> Reviewed-by: Ivy Lopez <skunkolee@gmail.com> Link: https://patch.msgid.link/20260921072551.3708191-1-liuc63@xiaopeng.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>