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ALSA: scarlett2: Use a private URB for the notification endpoint

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ALSA: scarlett2: Use a private URB for the notification endpoint scarlett2_init_notify() used mixer->urb, which snd_usb_mixer_status_create() allocates for the UAC2 status interrupt endpoint and mixer.c manages. On a device with that endpoint, the "already in use" check fires on the status URB and returns 0 for success without doing anything. No notification URB is submitted, and cmd_done is left zeroed because it is initialised past that check and nowhere else. scarlett2_usb_init() then issues SCARLETT2_USB_INIT_1 and wait_for_completion_timeout() would crash adding to the zeroed wait.head. Use a separate URB in scarlett2_data, as done for FCP, and initialise cmd_done in scarlett2_init_private(). mixer.c was also freeing the URB in snd_usb_mixer_free() and resubmitting it in snd_usb_mixer_activate(), so scarlett2 must now do both: add scarlett2_cleanup_urb(), called from private_free and private_suspend, and a private_resume callback to re-establish the URB after resume. scarlett2_init_notify() is reached from there, and the URB kill path in scarlett2_notify() completes cmd_done, leaving a stale count that would satisfy the next command's wait before the device ACKs. Use reinit_completion() to clear it. Also free the URB if the transfer buffer allocation fails, and both if usb_submit_urb() fails. Move scarlett2_init_notify() up next to scarlett2_cleanup_urb() so scarlett2_init_private() can reference it with

Announced Source revision 1
Original source ↗

CVE-2026-80815

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-2026-80815

Linux

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

Affected versions
Not stated in this record
Fixed versions
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Prerequisites
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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": "1b65088958cadab04d5d34a8615e2466b1b48ecb",
        "lessThan": "013448eb7b0d0b91d6168685dab10e9b41baa825",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1b65088958cadab04d5d34a8615e2466b1b48ecb",
        "lessThan": "4305e4b52acc0ca67dcfdf8f73dd943dab508ae8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1b65088958cadab04d5d34a8615e2466b1b48ecb",
        "lessThan": "04df0232a6976845cd9c9e83b6c26215759be667",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1b65088958cadab04d5d34a8615e2466b1b48ecb",
        "lessThan": "ecd2f83a4ddc078901e7104144cb6c5e5db3b7cf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1b65088958cadab04d5d34a8615e2466b1b48ecb",
        "lessThan": "cd17d6ff7b7d2b1dd9bcc80ae7b4a83773f918c6",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "sound/usb/mixer.c",
      "sound/usb/mixer.h",
      "sound/usb/mixer_scarlett2.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.12.106",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.47",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.11",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.1",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "sound/usb/mixer.c",
      "sound/usb/mixer.h",
      "sound/usb/mixer_scarlett2.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-80815

Source reference: /cveMetadata/cveId

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Event
#34832 · Revision 1
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