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CVE-2026-80815 (GCVE-0-2026-80815)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:13 – Updated: 2026-09-04 15:13
VLAI
Title
ALSA: scarlett2: Use a private URB for the notification endpoint
Summary
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 without a forward declaration.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1b65088958cadab04d5d34a8615e2466b1b48ecb , < 013448eb7b0d0b91d6168685dab10e9b41baa825 (git)
Affected: 1b65088958cadab04d5d34a8615e2466b1b48ecb , < 4305e4b52acc0ca67dcfdf8f73dd943dab508ae8 (git)
Affected: 1b65088958cadab04d5d34a8615e2466b1b48ecb , < 04df0232a6976845cd9c9e83b6c26215759be667 (git)
Affected: 1b65088958cadab04d5d34a8615e2466b1b48ecb , < ecd2f83a4ddc078901e7104144cb6c5e5db3b7cf (git)
Affected: 1b65088958cadab04d5d34a8615e2466b1b48ecb , < cd17d6ff7b7d2b1dd9bcc80ae7b4a83773f918c6 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.12.106 , ≤ 6.12.* (semver)
Unaffected: 6.18.47 , ≤ 6.18.* (semver)
Unaffected: 7.1.11 , ≤ 7.1.* (semver)
Unaffected: 7.2.1 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/usb/mixer.c",
            "sound/usb/mixer.h",
            "sound/usb/mixer_scarlett2.c"
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            "sound/usb/mixer.h",
            "sound/usb/mixer_scarlett2.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "6.10"
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.3-rc1",
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      ],
      "cpeApplicability": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: scarlett2: Use a private URB for the notification endpoint\n\nscarlett2_init_notify() used mixer-\u003eurb, which\nsnd_usb_mixer_status_create() allocates for the UAC2 status interrupt\nendpoint and mixer.c manages. On a device with that endpoint, the\n\"already in use\" check fires on the status URB and returns 0 for\nsuccess without doing anything. No notification URB is submitted, and\ncmd_done is left zeroed because it is initialised past that check and\nnowhere else. scarlett2_usb_init() then issues SCARLETT2_USB_INIT_1\nand wait_for_completion_timeout() would crash adding to the zeroed\nwait.head.\n\nUse a separate URB in scarlett2_data, as done for FCP, and initialise\ncmd_done in scarlett2_init_private(). mixer.c was also freeing the URB\nin snd_usb_mixer_free() and resubmitting it in\nsnd_usb_mixer_activate(), so scarlett2 must now do both: add\nscarlett2_cleanup_urb(), called from private_free and private_suspend,\nand a private_resume callback to re-establish the URB after resume.\nscarlett2_init_notify() is reached from there, and the URB kill path\nin scarlett2_notify() completes cmd_done, leaving a stale count that\nwould satisfy the next command\u0027s wait before the device ACKs. Use\nreinit_completion() to clear it.\n\nAlso free the URB if the transfer buffer allocation fails, and both if\nusb_submit_urb() fails. Move scarlett2_init_notify() up next to\nscarlett2_cleanup_urb() so scarlett2_init_private() can reference it\nwithout a forward declaration."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T15:13:35.740Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/013448eb7b0d0b91d6168685dab10e9b41baa825"
        },
        {
          "url": "https://git.kernel.org/stable/c/4305e4b52acc0ca67dcfdf8f73dd943dab508ae8"
        },
        {
          "url": "https://git.kernel.org/stable/c/04df0232a6976845cd9c9e83b6c26215759be667"
        },
        {
          "url": "https://git.kernel.org/stable/c/ecd2f83a4ddc078901e7104144cb6c5e5db3b7cf"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd17d6ff7b7d2b1dd9bcc80ae7b4a83773f918c6"
        }
      ],
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80815",
    "datePublished": "2026-09-04T15:13:35.740Z",
    "dateReserved": "2026-08-26T14:34:25.794Z",
    "dateUpdated": "2026-09-04T15:13:35.740Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-09-15",
      "epss": "0.00168",
      "percentile": "0.06368"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80815\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-04T16:18:09.057\",\"lastModified\":\"2026-09-04T16:18:09.057\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nALSA: scarlett2: Use a private URB for the notification endpoint\\n\\nscarlett2_init_notify() used mixer-\u003eurb, which\\nsnd_usb_mixer_status_create() allocates for the UAC2 status interrupt\\nendpoint and mixer.c manages. On a device with that endpoint, the\\n\\\"already in use\\\" check fires on the status URB and returns 0 for\\nsuccess without doing anything. No notification URB is submitted, and\\ncmd_done is left zeroed because it is initialised past that check and\\nnowhere else. scarlett2_usb_init() then issues SCARLETT2_USB_INIT_1\\nand wait_for_completion_timeout() would crash adding to the zeroed\\nwait.head.\\n\\nUse a separate URB in scarlett2_data, as done for FCP, and initialise\\ncmd_done in scarlett2_init_private(). mixer.c was also freeing the URB\\nin snd_usb_mixer_free() and resubmitting it in\\nsnd_usb_mixer_activate(), so scarlett2 must now do both: add\\nscarlett2_cleanup_urb(), called from private_free and private_suspend,\\nand a private_resume callback to re-establish the URB after resume.\\nscarlett2_init_notify() is reached from there, and the URB kill path\\nin scarlett2_notify() completes cmd_done, leaving a stale count that\\nwould satisfy the next command\u0027s wait before the device ACKs. Use\\nreinit_completion() to clear it.\\n\\nAlso free the URB if the transfer buffer allocation fails, and both if\\nusb_submit_urb() fails. Move scarlett2_init_notify() up next to\\nscarlett2_cleanup_urb() so scarlett2_init_private() can reference it\\nwithout a forward declaration.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"sound/usb/mixer.c\",\"sound/usb/mixer.h\",\"sound/usb/mixer_scarlett2.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"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\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"sound/usb/mixer.c\",\"sound/usb/mixer.h\",\"sound/usb/mixer_scarlett2.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.106\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.47\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.11\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.1\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/013448eb7b0d0b91d6168685dab10e9b41baa825\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/04df0232a6976845cd9c9e83b6c26215759be667\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4305e4b52acc0ca67dcfdf8f73dd943dab508ae8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cd17d6ff7b7d2b1dd9bcc80ae7b4a83773f918c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ecd2f83a4ddc078901e7104144cb6c5e5db3b7cf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-08T17:17:02Z",
      "cve": "CVE-2026-80815",
      "id": "CVE-2026-80815",
      "initial_release_date": "2026-09-05T00:26:50Z",
      "product_status:known_not_affected": "353",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80815",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80815.json",
      "version": "4"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.