FKIE_CVE-2026-68339

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-17 06:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: validate Realtek vendor event length btusb_recv_event_realtek() reads the event code at data[0] and the Realtek subevent code at data[2] before deciding whether to consume a vendor event as a coredump. For example, the two-byte event ff 00 contains a complete vendor-event header declaring zero parameters. The old classifier still reads a nonexistent third byte and can misclassify the event as a coredump if the adjacent byte is 0x34. Require the HCI event header and first parameter to be present before inspecting the Realtek subevent code. Short events continue through the normal HCI receive path, which owns their protocol validation.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/24b0758193d70da47ef8b979153d2a181dbdf34e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/400267bab0f4076088e163e58cad2bb41c3cf5e7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8881daaafadbe7fb2b7341d16a3949114409c90c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8de58bfa26e028f99271dde5a92107cd07f5e063
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/df541cd485ff80a5ddc579d99687bc7506df9851
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/btusb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8de58bfa26e028f99271dde5a92107cd07f5e063",
              "status": "affected",
              "version": "044014ce85a17c0b7fab8e5df0925792010c29b2",
              "versionType": "git"
            },
            {
              "lessThan": "400267bab0f4076088e163e58cad2bb41c3cf5e7",
              "status": "affected",
              "version": "044014ce85a17c0b7fab8e5df0925792010c29b2",
              "versionType": "git"
            },
            {
              "lessThan": "8881daaafadbe7fb2b7341d16a3949114409c90c",
              "status": "affected",
              "version": "044014ce85a17c0b7fab8e5df0925792010c29b2",
              "versionType": "git"
            },
            {
              "lessThan": "24b0758193d70da47ef8b979153d2a181dbdf34e",
              "status": "affected",
              "version": "044014ce85a17c0b7fab8e5df0925792010c29b2",
              "versionType": "git"
            },
            {
              "lessThan": "df541cd485ff80a5ddc579d99687bc7506df9851",
              "status": "affected",
              "version": "044014ce85a17c0b7fab8e5df0925792010c29b2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/btusb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\nBluetooth: btusb: validate Realtek vendor event length\n\nbtusb_recv_event_realtek() reads the event code at data[0] and the Realtek\nsubevent code at data[2] before deciding whether to consume a vendor event\nas a coredump.\n\nFor example, the two-byte event ff 00 contains a complete vendor-event\nheader declaring zero parameters. The old classifier still reads a\nnonexistent third byte and can misclassify the event as a coredump if the\nadjacent byte is 0x34.\n\nRequire the HCI event header and first parameter to be present before\ninspecting the Realtek subevent code. Short events continue through the\nnormal HCI receive path, which owns their protocol validation."
    }
  ],
  "id": "CVE-2026-68339",
  "lastModified": "2026-08-17T06:17:42.063",
  "metrics": {},
  "published": "2026-08-10T13:20:24.357",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/24b0758193d70da47ef8b979153d2a181dbdf34e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/400267bab0f4076088e163e58cad2bb41c3cf5e7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8881daaafadbe7fb2b7341d16a3949114409c90c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8de58bfa26e028f99271dde5a92107cd07f5e063"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/df541cd485ff80a5ddc579d99687bc7506df9851"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.