{"id":"CVE-2026-90033","published":"2026-09-16T11:17:16.437","lastModified":"2026-09-16T11:17:16.437","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: fix OOB write in snd_usbmidi_us122l_output()\n\nThe snd_usbmidi_us122l_output() picks a count of 2 on anything slower\nthan high speed and never relates it to ep->max_transfer.  The URB\nbuffer holds exactly max_transfer bytes, so a device declaring a one\nbyte bulk endpoint takes two bytes from snd_rawmidi_transmit(), and the\nmemset that pads the rest computes 1 - 2 in int and wraps to SIZE_MAX.\n\nOnly 0x800e and 0x800f are pinned to nine bytes.  The US-122MKII at\n0x0644:0x8021 falls to the default and takes usb_maxpacket(), which the\nUSB core only clamps downward.\n\nThe akai and novation output ops in this file were given the same guard\nrecently.  Do the same here.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/1d4add2b832b56f81bb0eab065ec35c610343018","tags":[]},{"url":"https://git.kernel.org/stable/c/2dae0e3a59e31f78222279d544b98e747cd1fbff","tags":[]},{"url":"https://git.kernel.org/stable/c/5538daf2a5cc80ac3f3e913c0db045d92d995d40","tags":[]},{"url":"https://git.kernel.org/stable/c/9392a2c346762ffee8edd1ba8bac50d2e24a2ed7","tags":[]},{"url":"https://git.kernel.org/stable/c/9d81885d97cba7796d1f8edc88f2499c8296f5b9","tags":[]},{"url":"https://git.kernel.org/stable/c/a441a8e52148c91c2f2a91f42e3b9bc961a13a4b","tags":[]},{"url":"https://git.kernel.org/stable/c/de6d252f115be887a701c09a05cdb076f3a590c9","tags":[]},{"url":"https://git.kernel.org/stable/c/e4637ce34607f1733a34a57294966d26b263e626","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}