GHSA-FGXF-Q65M-Q88V

Vulnerability from github – Published: 2025-05-02 18:31 – Updated: 2025-11-12 21:30
VLAI
Details

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

usb: ucsi: Fix NULL pointer deref in ucsi_connector_change()

When ucsi_init() fails, ucsi->connector is NULL, yet in case of ucsi_acpi we may still get events which cause the ucs_acpi code to call ucsi_connector_change(), which then derefs the NULL ucsi->connector pointer.

Fix this by not setting ucsi->ntfy inside ucsi_init() until ucsi_init() has succeeded, so that ucsi_connector_change() ignores the events because UCSI_ENABLE_NTFY_CONNECTOR_CHANGE is not set in the ntfy mask.

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-2023-53049"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-02T16:15:23Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: ucsi: Fix NULL pointer deref in ucsi_connector_change()\n\nWhen ucsi_init() fails, ucsi-\u003econnector is NULL, yet in case of\nucsi_acpi we may still get events which cause the ucs_acpi code to call\nucsi_connector_change(), which then derefs the NULL ucsi-\u003econnector\npointer.\n\nFix this by not setting ucsi-\u003entfy inside ucsi_init() until ucsi_init()\nhas succeeded, so that ucsi_connector_change() ignores the events\nbecause UCSI_ENABLE_NTFY_CONNECTOR_CHANGE is not set in the ntfy mask.",
  "id": "GHSA-fgxf-q65m-q88v",
  "modified": "2025-11-12T21:30:59Z",
  "published": "2025-05-02T18:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53049"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1c5abcb13491da8c049f20462189c12c753ba978"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7dd27aed9c456670b3882877ef17a48195f21693"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ef0423e43f877a328454059d46763043ce3da44"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f87fb985452ab2083967103ac00bfd68fb182764"
    }
  ],
  "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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