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Bluetooth: btusb: validate Realtek vendor event length

Type: advisorySource: OSV1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-68339

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: osv:CVE-2026-68339

Kernel

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
6.6.148

Source reference: /affected/1/ranges

6.12.101

Source reference: /affected/1/ranges

6.18.42

Source reference: /affected/1/ranges

7.1.6

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
        "type": "GIT",
        "events": [
          {
            "introduced": "044014ce85a17c0b7fab8e5df0925792010c29b2"
          },
          {
            "fixed": "8de58bfa26e028f99271dde5a92107cd07f5e063"
          },
          {
            "fixed": "400267bab0f4076088e163e58cad2bb41c3cf5e7"
          },
          {
            "fixed": "8881daaafadbe7fb2b7341d16a3949114409c90c"
          },
          {
            "fixed": "24b0758193d70da47ef8b979153d2a181dbdf34e"
          },
          {
            "fixed": "df541cd485ff80a5ddc579d99687bc7506df9851"
          }
        ]
      }
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68339.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.6.0"
          },
          {
            "fixed": "6.6.148"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.7.0"
          },
          {
            "fixed": "6.12.101"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.13.0"
          },
          {
            "fixed": "6.18.42"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.19.0"
          },
          {
            "fixed": "7.1.6"
          }
        ]
      }
    ],
    "package": {
      "name": "Kernel",
      "ecosystem": "Linux"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68339.json"
    }
  }
]
Related CVEs
CVE-2026-68339

Source reference: /id

Publisher severity

No explicit severity was provided.

Event
#50706 · Revision 1
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Publisher date
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