GHSA-5324-G7QJ-PJFX

Vulnerability from github – Published: 2026-04-22 15:31 – Updated: 2026-04-28 15:30
VLAI?
Details

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

Bluetooth: btusb: clamp SCO altsetting table indices

btusb_work() maps the number of active SCO links to USB alternate settings through a three-entry lookup table when CVSD traffic uses transparent voice settings. The lookup currently indexes alts[] with data->sco_num - 1 without first constraining sco_num to the number of available table entries.

While the table only defines alternate settings for up to three SCO links, data->sco_num comes from hci_conn_num() and is used directly. Cap the lookup to the last table entry before indexing it so the driver keeps selecting the highest supported alternate setting without reading past alts[].

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-31497"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-22T14:16:47Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btusb: clamp SCO altsetting table indices\n\nbtusb_work() maps the number of active SCO links to USB alternate\nsettings through a three-entry lookup table when CVSD traffic uses\ntransparent voice settings. The lookup currently indexes alts[] with\ndata-\u003esco_num - 1 without first constraining sco_num to the number of\navailable table entries.\n\nWhile the table only defines alternate settings for up to three SCO\nlinks, data-\u003esco_num comes from hci_conn_num() and is used directly.\nCap the lookup to the last table entry before indexing it so the\ndriver keeps selecting the highest supported alternate setting without\nreading past alts[].",
  "id": "GHSA-5324-g7qj-pjfx",
  "modified": "2026-04-28T15:30:47Z",
  "published": "2026-04-22T15:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31497"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1019028eb124564cf7bca58a16f1df8a1ca30726"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/129fa608b6ad08b8ab7178eeb2ec272c993aaccc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21c254202f9d78abe0fcd642a92966deb92bd226"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/312c4450fe23014665c163f480edd5ad2e27bbb8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/476c9262b430c38c6a701a3b8176a3f48689085b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6fba3c3d48c927e55611a0f5ea34da88138ed0ff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/834cf890d2c3d29cbfa1ee2376c40469c28ec297"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9dd13a8641de79bc1bc93da55cdd35259a002683"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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