{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-46186",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-46186",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-28T09:36:40.349Z",
    "updatedAt": "2026-06-14T18:01:09.675Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Bluetooth: virtio_bt: validate rx pkt_type header length",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: virtio_bt: validate rx pkt_type header length\n\nvirtbt_rx_handle() reads the leading pkt_type byte from the RX skb\nand forwards the remainder to hci_recv_frame() for every\nevent/ACL/SCO/ISO type, without checking that the remaining payload\nis at least the fixed HCI header for that type.\n\nAfter the preceding patch bounds the backend-supplied used.len to\n[1, VIRTBT_RX_BUF_SIZE], a one-byte completion still reaches\nhci_recv_frame() with skb->len already pulled to 0. If the byte\nhappened to be HCI_ACLDATA_PKT, the ACL-vs-ISO classification\nfast-path in hci_dev_classify_pkt_type() dereferences\nhci_acl_hdr(skb)->handle whenever the HCI device has an active\nCIS_LINK, BIS_LINK, or PA_LINK connection, reading two bytes of\nuninitialized RX-buffer data. The same hazard exists for every\npacket type the driver accepts because none of the switch cases in\nvirtbt_rx_handle() check skb->len against the per-type minimum HCI\nheader size before handing the frame to the core.\n\nAfter stripping pkt_type, require skb->len to cover the fixed\nheader size for the selected type (event 2, ACL 4, SCO 3, ISO 4)\nbefore calling hci_recv_frame(); drop ratelimited otherwise.\nUnknown pkt_type values still take the original kfree_skb() default\npath.\n\nUse bt_dev_err_ratelimited() because both the length and pkt_type\nvalues come from an untrusted backend that can otherwise flood the\nkernel log.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "cf2719a21fdb9d4c8e9c834d279163609bef575d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "149cfb42ad69c7964fd9f2c43831da9152007129"
            },
            {
              "version": "160fbcf3bfb93c3c086427f9f4c8bc70f217e9be",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7b2d4c04816cdc887f472caaf7fc966cfc107e40"
            },
            {
              "version": "160fbcf3bfb93c3c086427f9f4c8bc70f217e9be",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1e1e509b6fd2a42421745bbcd98bd16daad20904"
            },
            {
              "version": "160fbcf3bfb93c3c086427f9f4c8bc70f217e9be",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2c1143564c71e7497b42d8360a8379ccbb011d3c"
            },
            {
              "version": "160fbcf3bfb93c3c086427f9f4c8bc70f217e9be",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3485c7236c59c8c34a41af1c4b52982437554e79"
            },
            {
              "version": "160fbcf3bfb93c3c086427f9f4c8bc70f217e9be",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f743eab6486965f276c7e3f1700895f014fdc6db"
            },
            {
              "version": "160fbcf3bfb93c3c086427f9f4c8bc70f217e9be",
              "status": "affected",
              "versionType": "git",
              "lessThan": "daf23014e5d975e72ea9c02b5160d3fcf070ea47"
            },
            {
              "version": "9b67438e315b925a699f0178f4a48baf3d2d6ef4",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.15.78",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.209"
            },
            {
              "version": "6.0.8",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.1",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.1"
            },
            {
              "version": "5.15.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.140",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.88",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.30",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}