{
  "cveId": "CVE-2021-47108",
  "url": "https://patchblox.com/security/cve/CVE-2021-47108",
  "summary": "CVE-2021-47108 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47108, released March 4, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  drm/mediatek: hdmi: Perform NULL pointer check f...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  drm/mediatek: hdmi: Perform NULL pointer check for mtk_hdmi_conf  In commit 41ca9caaae0b (\u0022drm/mediatek: hdmi: Add check for CEA modes only\u0022) a check for CEA modes was added to function mtk_hdmi_bridge_mode_valid() in order to address possible issues on MT8167; moreover, with commit c91026a938c2 (\u0022drm/mediatek: hdmi: Add optional limit on maximal HDMI mode clock\u0022) another similar check was introduced.  Unfortunately though, at the time of writing, MT8173 does not provide any mtk_hdmi_conf structure and this is crashing the kernel with NULL pointer upon entering mtk_hdmi_bridge_mode_valid(), which happens as soon as a HDMI cable gets plugged in.  To fix this regression, add a NULL pointer check for hdmi-\u003Econf in the said function, restoring HDMI functionality and avoiding NULL pointer kernel panics.",
  "published": "2024-03-04T19:15:18Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00198,
  "epssPercentile": 0.09603,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47108",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47108",
      "released": "2024-03-04T19:15:18Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47108",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47108",
      "released": "2024-03-04T19:15:18Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47108",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47108",
      "released": "2024-03-04T19:15:18Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}