ghsa-wq4c-35xc-p7xq
Vulnerability from github
Published
2025-10-21 12:31
Modified
2025-10-21 12:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

drm/mediatek: Add vblank register/unregister callback functions

We encountered a kernel panic issue that callback data will be NULL when it's using in ovl irq handler. There is a timing issue between mtk_disp_ovl_irq_handler() and mtk_ovl_disable_vblank().

To resolve this issue, we use the flow to register/unregister vblank cb: - Register callback function and callback data when crtc creates. - Unregister callback function and callback data when crtc destroies.

With this solution, we can assure callback data will not be NULL when vblank is disable.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49506"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:26Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: Add vblank register/unregister callback functions\n\nWe encountered a kernel panic issue that callback data will be NULL when\nit\u0027s using in ovl irq handler. There is a timing issue between\nmtk_disp_ovl_irq_handler() and mtk_ovl_disable_vblank().\n\nTo resolve this issue, we use the flow to register/unregister vblank cb:\n- Register callback function and callback data when crtc creates.\n- Unregister callback function and callback data when crtc destroies.\n\nWith this solution, we can assure callback data will not be NULL when\nvblank is disable.",
  "id": "GHSA-wq4c-35xc-p7xq",
  "modified": "2025-10-21T12:31:26Z",
  "published": "2025-10-21T12:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49506"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3a4027b5971fe2a94e32754f007d9d3c12c68ad1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a265d9838bc3c63579002d55c2b2c655c4f8f26"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a2dbdeccef6de47565638abdf3c25f41cdffc37"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b74d921b900b6ce38c6247c0a1c86be9f3746493"
    }
  ],
  "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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