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FKIE_CVE-2026-90033

Vulnerability from fkie_nvd - Published: 2026-09-16 11:17 - Updated: 2026-09-16 11:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: fix OOB write in snd_usbmidi_us122l_output() The snd_usbmidi_us122l_output() picks a count of 2 on anything slower than high speed and never relates it to ep->max_transfer. The URB buffer holds exactly max_transfer bytes, so a device declaring a one byte bulk endpoint takes two bytes from snd_rawmidi_transmit(), and the memset that pads the rest computes 1 - 2 in int and wraps to SIZE_MAX. Only 0x800e and 0x800f are pinned to nine bytes. The US-122MKII at 0x0644:0x8021 falls to the default and takes usb_maxpacket(), which the USB core only clamps downward. The akai and novation output ops in this file were given the same guard recently. Do the same here.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1d4add2b832b56f81bb0eab065ec35c610343018
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2dae0e3a59e31f78222279d544b98e747cd1fbff
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5538daf2a5cc80ac3f3e913c0db045d92d995d40
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9392a2c346762ffee8edd1ba8bac50d2e24a2ed7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9d81885d97cba7796d1f8edc88f2499c8296f5b9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a441a8e52148c91c2f2a91f42e3b9bc961a13a4b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/de6d252f115be887a701c09a05cdb076f3a590c9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e4637ce34607f1733a34a57294966d26b263e626
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/usb/midi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5538daf2a5cc80ac3f3e913c0db045d92d995d40",
              "status": "affected",
              "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
              "versionType": "git"
            },
            {
              "lessThan": "a441a8e52148c91c2f2a91f42e3b9bc961a13a4b",
              "status": "affected",
              "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
              "versionType": "git"
            },
            {
              "lessThan": "2dae0e3a59e31f78222279d544b98e747cd1fbff",
              "status": "affected",
              "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
              "versionType": "git"
            },
            {
              "lessThan": "1d4add2b832b56f81bb0eab065ec35c610343018",
              "status": "affected",
              "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
              "versionType": "git"
            },
            {
              "lessThan": "de6d252f115be887a701c09a05cdb076f3a590c9",
              "status": "affected",
              "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
              "versionType": "git"
            },
            {
              "lessThan": "9392a2c346762ffee8edd1ba8bac50d2e24a2ed7",
              "status": "affected",
              "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
              "versionType": "git"
            },
            {
              "lessThan": "9d81885d97cba7796d1f8edc88f2499c8296f5b9",
              "status": "affected",
              "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
              "versionType": "git"
            },
            {
              "lessThan": "e4637ce34607f1733a34a57294966d26b263e626",
              "status": "affected",
              "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "sound/usb/midi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.28"
            },
            {
              "lessThan": "2.6.28",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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",
  "lastModified": "2026-09-16T11:17:16.437",
  "metrics": {},
  "published": "2026-09-16T11:17:16.437",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1d4add2b832b56f81bb0eab065ec35c610343018"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2dae0e3a59e31f78222279d544b98e747cd1fbff"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5538daf2a5cc80ac3f3e913c0db045d92d995d40"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9392a2c346762ffee8edd1ba8bac50d2e24a2ed7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9d81885d97cba7796d1f8edc88f2499c8296f5b9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a441a8e52148c91c2f2a91f42e3b9bc961a13a4b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/de6d252f115be887a701c09a05cdb076f3a590c9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e4637ce34607f1733a34a57294966d26b263e626"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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