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ALSA: usb-audio: fix OOB write in snd_usbmidi_us122l_output()

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-90033

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-90033

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
        "lessThan": "5538daf2a5cc80ac3f3e913c0db045d92d995d40",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
        "lessThan": "a441a8e52148c91c2f2a91f42e3b9bc961a13a4b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
        "lessThan": "2dae0e3a59e31f78222279d544b98e747cd1fbff",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
        "lessThan": "1d4add2b832b56f81bb0eab065ec35c610343018",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
        "lessThan": "de6d252f115be887a701c09a05cdb076f3a590c9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
        "lessThan": "9392a2c346762ffee8edd1ba8bac50d2e24a2ed7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
        "lessThan": "9d81885d97cba7796d1f8edc88f2499c8296f5b9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "030a07e441296c372f946cd4065b5d831d8dc40c",
        "lessThan": "e4637ce34607f1733a34a57294966d26b263e626",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "sound/usb/midi.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.28"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.28",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.51",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "sound/usb/midi.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-90033

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#36459 · Revision 1
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Publisher date
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