{"id":"CVE-2026-90033","summary":"ALSA: usb-audio: fix OOB write in snd_usbmidi_us122l_output()","details":"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-\u003emax_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.","modified":"2026-09-18T03:48:35.040496362Z","published":"2026-09-16T10:33:33.899Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90033.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1d4add2b832b56f81bb0eab065ec35c610343018"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2dae0e3a59e31f78222279d544b98e747cd1fbff"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5538daf2a5cc80ac3f3e913c0db045d92d995d40"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9392a2c346762ffee8edd1ba8bac50d2e24a2ed7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9d81885d97cba7796d1f8edc88f2499c8296f5b9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a441a8e52148c91c2f2a91f42e3b9bc961a13a4b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de6d252f115be887a701c09a05cdb076f3a590c9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e4637ce34607f1733a34a57294966d26b263e626"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90033.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90033"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"030a07e441296c372f946cd4065b5d831d8dc40c"},{"fixed":"5538daf2a5cc80ac3f3e913c0db045d92d995d40"},{"fixed":"a441a8e52148c91c2f2a91f42e3b9bc961a13a4b"},{"fixed":"2dae0e3a59e31f78222279d544b98e747cd1fbff"},{"fixed":"1d4add2b832b56f81bb0eab065ec35c610343018"},{"fixed":"de6d252f115be887a701c09a05cdb076f3a590c9"},{"fixed":"9392a2c346762ffee8edd1ba8bac50d2e24a2ed7"},{"fixed":"9d81885d97cba7796d1f8edc88f2499c8296f5b9"},{"fixed":"e4637ce34607f1733a34a57294966d26b263e626"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90033.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.28"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90033.json"}}],"schema_version":"1.9.0"}