{"id":"CVE-2026-90033","title":"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 i…","summary":"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 i…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 030a07e441296c372f946cd4065b5d831d8dc40c < 5538daf2a5cc80ac3f3e913c0db045d92d995d40","Linux >= 030a07e441296c372f946cd4065b5d831d8dc40c < a441a8e52148c91c2f2a91f42e3b9bc961a13a4b","Linux >= 030a07e441296c372f946cd4065b5d831d8dc40c < 2dae0e3a59e31f78222279d544b98e747cd1fbff","Linux >= 030a07e441296c372f946cd4065b5d831d8dc40c < 1d4add2b832b56f81bb0eab065ec35c610343018","Linux >= 030a07e441296c372f946cd4065b5d831d8dc40c < de6d252f115be887a701c09a05cdb076f3a590c9","Linux >= 030a07e441296c372f946cd4065b5d831d8dc40c < 9392a2c346762ffee8edd1ba8bac50d2e24a2ed7","Linux >= 030a07e441296c372f946cd4065b5d831d8dc40c < 9d81885d97cba7796d1f8edc88f2499c8296f5b9","Linux >= 030a07e441296c372f946cd4065b5d831d8dc40c < e4637ce34607f1733a34a57294966d26b263e626","Linux 2.6.28"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T11:17:16.437","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90033","references":[{"url":"https://git.kernel.org/stable/c/1d4add2b832b56f81bb0eab065ec35c610343018","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2dae0e3a59e31f78222279d544b98e747cd1fbff","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5538daf2a5cc80ac3f3e913c0db045d92d995d40","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9392a2c346762ffee8edd1ba8bac50d2e24a2ed7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9d81885d97cba7796d1f8edc88f2499c8296f5b9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a441a8e52148c91c2f2a91f42e3b9bc961a13a4b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/de6d252f115be887a701c09a05cdb076f3a590c9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e4637ce34607f1733a34a57294966d26b263e626","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90033.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90033"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2535108"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90033"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90033"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90033.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-90033"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-16T10:53:53.933Z","epss":0.00201,"epssPercentile":0.09969,"cvss":4.3,"cvssVector":"CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-787"],"slug":"CVE-2026-90033","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90033.json)","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228707,"id":"CVE-2026-90033","ts":1792844924448,"field":"cvss","old":null,"new":"4.3"},{"seq":228706,"id":"CVE-2026-90033","ts":1792844924448,"field":"severity","old":"none","new":"medium"}]}