{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-46232",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-46232"
  ],
  "published": "2026-05-28T09:40:54Z",
  "summary": "HID: playstation: Clamp num_touch_reports",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: playstation: Clamp num_touch_reports\n\nA device would never lie about the number of touch reports would it?\n\nIf it does the loop in dualshock4_parse_report will read off the end of\nthe touch_reports array, up to about 2 KiB for the maximum number of 256\nloop iteraions. The data that is read is emitted via evdev if the\nDS4_TOUCH_POINT_INACTIVE bit happens to be set. Protect against this by\nclamping the num_touch_reports value provided by the device to the\nmaximum size of the touch_reports array.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-46232"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0bc4cf1a6ba00fb8c074531b179bc7b97502fbc4"
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    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
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      "cvss_v3_severity": "High",
      "scenario": "AV:A - The DualShock4 binds over both Bluetooth (HID_BLUETOOTH_DEVICE) and USB; a malicious/compromised controller within Bluetooth radio range delivers the crafted report, making Adjacent the most severe reasonable transport (higher than the USB/Physical path).\nAC:L - The device fully controls num_touch_reports and can deterministically set it to 255; the BT CRC32 uses a fixed, known seed the attacker computes. No race or attacker-uncontrolled condition is involved.\nPR:N - No privileges on the target are needed \u2014 the malicious HID device itself is the attacker, supplying crafted input reports that the kernel parses automatically.\nUI:N - A bonded controller (or a device emulating one) auto-reconnects and autonomously streams the malicious reports; no victim action triggers the out-of-bounds read.\nS:U - The impact is confined to the kernel's own memory and the input subsystem; no security boundary (VM, IOMMU, sandbox) is crossed.\nC:H - Up to ~2 KiB of adjacent kernel heap is read out of bounds, and the X/Y coordinates derived from that memory are emitted to userspace through the touchpad evdev device \u2014 a substantial kernel-memory disclosure, not bounded to a few bytes.\nI:N - The flaw is purely an out-of-bounds read; no kernel memory is written, modified, or corrupted.\nA:H - Reading up to ~2 KiB past the heap allocation can reach an unmapped page and trigger a kernel oops/panic."
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}