{
  "cveId": "CVE-2026-80760",
  "url": "https://patchblox.com/security/cve/CVE-2026-80760",
  "summary": "CVE-2026-80760 is fixed in linux on 1 platform by DEBIAN-CVE-2026-80760 (version 7.1.12-1), released September 5, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: MGMT: reject HCI_CMD_SYNC params_len...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: MGMT: reject HCI_CMD_SYNC params_len above 255  mgmt_hci_cmd_sync() checks that the message length agrees with params_len but puts no upper bound on it. params_len is __le16 while the parameter length in the HCI command header is a u8:  \tstruct hci_command_hdr { \t\t__le16\topcode; \t\t__u8\tplen; \t} __packed;  hci_cmd_sync_alloc() assigns one to the other:  \thdr-\u003Eplen = plen;  \tif (plen) \t\tskb_put_data(skb, param, plen);  so a params_len of 256 leaves plen at 0 while all 256 bytes are still appended. The frame handed to the driver then declares no parameters and carries 256 of them. On a length framed transport such as H:4 the controller takes the trailing bytes as the start of the next packet.  The mgmt socket MTU is HCI_MAX_FRAME_SIZE, so params_len can reach about 1KB this way. Commit 03f1700b9b4d (\u0022Bluetooth: MGMT: reject malformed HCI_CMD_SYNC commands\u0022) only made params_len agree with the message length, a value that fits the message but not the header field is still accepted.  Reject params_len that does not fit the header field.",
  "published": "2026-09-04T16:18:01Z",
  "severity": "",
  "epss": 0.00209,
  "epssPercentile": 0.11083,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.12-1",
      "fix": "DEBIAN-CVE-2026-80760",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80760",
      "released": "2026-09-05T01:57:10Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}