GHSA-J4PV-6P78-8G93

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-20 15:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: HIDP: fix missing length checks in hidp_input_report()

hidp_input_report() reads keyboard and mouse payload data from an skb without first verifying that skb->len contains enough data.

hidp_recv_intr_frame() pulls the 1-byte HIDP header before dispatching to hidp_input_report(). If a paired device sends a truncated packet, the handler reads beyond the valid skb data, resulting in an out-of-bounds read of skb data. The OOB bytes may be interpreted as phantom key presses or spurious mouse movement.

Replace the open-coded length tracking and pointer arithmetic with skb_pull_data() calls. skb_pull_data() returns NULL if the requested bytes are not present, eliminating the need for a manual size variable and the separate skb->len guard.

Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-63947"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:13Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: HIDP: fix missing length checks in hidp_input_report()\n\nhidp_input_report() reads keyboard and mouse payload data from an skb\nwithout first verifying that skb-\u003elen contains enough data.\n\nhidp_recv_intr_frame() pulls the 1-byte HIDP header before dispatching\nto hidp_input_report(). If a paired device sends a truncated packet,\nthe handler reads beyond the valid skb data, resulting in an\nout-of-bounds read of skb data. The OOB bytes may be interpreted as\nphantom key presses or spurious mouse movement.\n\nReplace the open-coded length tracking and pointer arithmetic with\nskb_pull_data() calls. skb_pull_data() returns NULL if the requested\nbytes are not present, eliminating the need for a manual size variable\nand the separate skb-\u003elen guard.",
  "id": "GHSA-j4pv-6p78-8g93",
  "modified": "2026-07-20T15:31:53Z",
  "published": "2026-07-19T18:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63947"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f08a90013e1e632b34321334e861fcefc056505"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a3ac9ee11dbb9845f3947cef4a79dba658cf6f6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6348dfed5b0f9c6074f14322332e97493d32fef0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b83dcacd2ec7fcc5a48be215f82d573759f87ec2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cc3832b19f863e3677c5651f001a2e3795f39eb8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d313683d6ccdd8c01e0562270a2ae25b86d8461d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7d6a81b8dd1a8d084a1b755db9406041d53adb5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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