{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "030a07e441296c372f946cd4065b5d831d8dc40c"
            },
            {
              "fixed": "5538daf2a5cc80ac3f3e913c0db045d92d995d40"
            },
            {
              "fixed": "a441a8e52148c91c2f2a91f42e3b9bc961a13a4b"
            },
            {
              "fixed": "2dae0e3a59e31f78222279d544b98e747cd1fbff"
            },
            {
              "fixed": "1d4add2b832b56f81bb0eab065ec35c610343018"
            },
            {
              "fixed": "de6d252f115be887a701c09a05cdb076f3a590c9"
            },
            {
              "fixed": "9392a2c346762ffee8edd1ba8bac50d2e24a2ed7"
            },
            {
              "fixed": "9d81885d97cba7796d1f8edc88f2499c8296f5b9"
            },
            {
              "fixed": "e4637ce34607f1733a34a57294966d26b263e626"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "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"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90033.json"
  },
  "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.",
  "id": "CVE-2026-90033",
  "modified": "2026-09-18T03:30:48.355669415Z",
  "published": "2026-09-16T10:33:33.899Z",
  "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"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ALSA: usb-audio: fix OOB write in snd_usbmidi_us122l_output()"
}