GHSA-JQQC-7468-4F66

Vulnerability from github – Published: 2024-11-05 18:32 – Updated: 2026-05-12 15:30
VLAI
Details

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

drm/vboxvideo: Replace fake VLA at end of vbva_mouse_pointer_shape with real VLA

Replace the fake VLA at end of the vbva_mouse_pointer_shape shape with a real VLA to fix a "memcpy: detected field-spanning write error" warning:

[ 13.319813] memcpy: detected field-spanning write (size 16896) of single field "p->data" at drivers/gpu/drm/vboxvideo/hgsmi_base.c:154 (size 4) [ 13.319841] WARNING: CPU: 0 PID: 1105 at drivers/gpu/drm/vboxvideo/hgsmi_base.c:154 hgsmi_update_pointer_shape+0x192/0x1c0 [vboxvideo] [ 13.320038] Call Trace: [ 13.320173] hgsmi_update_pointer_shape [vboxvideo] [ 13.320184] vbox_cursor_atomic_update [vboxvideo]

Note as mentioned in the added comment it seems the original length calculation for the allocated and send hgsmi buffer is 4 bytes too large. Changing this is not the goal of this patch, so this behavior is kept.

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-2024-50134"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-05T18:15:16Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vboxvideo: Replace fake VLA at end of vbva_mouse_pointer_shape with real VLA\n\nReplace the fake VLA at end of the vbva_mouse_pointer_shape shape with\na real VLA to fix a \"memcpy: detected field-spanning write error\" warning:\n\n[   13.319813] memcpy: detected field-spanning write (size 16896) of single field \"p-\u003edata\" at drivers/gpu/drm/vboxvideo/hgsmi_base.c:154 (size 4)\n[   13.319841] WARNING: CPU: 0 PID: 1105 at drivers/gpu/drm/vboxvideo/hgsmi_base.c:154 hgsmi_update_pointer_shape+0x192/0x1c0 [vboxvideo]\n[   13.320038] Call Trace:\n[   13.320173]  hgsmi_update_pointer_shape [vboxvideo]\n[   13.320184]  vbox_cursor_atomic_update [vboxvideo]\n\nNote as mentioned in the added comment it seems the original length\ncalculation for the allocated and send hgsmi buffer is 4 bytes too large.\nChanging this is not the goal of this patch, so this behavior is kept.",
  "id": "GHSA-jqqc-7468-4f66",
  "modified": "2026-05-12T15:30:40Z",
  "published": "2024-11-05T18:32:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50134"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/02c86c5d5ef4bbba17d38859c74872825f536617"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/34a422274b693507025a7db21519865d1862afcb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7458a6cdaebb3dc59af8578ee354fae78a154c4a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/75f828e944dacaac8870418461d3d48a1ecf2331"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9eb32bd23bbcec44bcbef27b7f282b7a7f3d0391"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d92b90f9a54d9300a6e883258e79f36dab53bfae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fae9dc12c61ce23cf29d09824a741b7b1ff8f01f"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
    }
  ],
  "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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