{
  "cveId": "CVE-2026-97876",
  "url": "https://patchblox.com/security/cve/CVE-2026-97876",
  "summary": "CVE-2026-97876 is fixed in grub2 on 1 platform by DEBIAN-CVE-2026-97876 (version 2.14-4), released October 6, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "grub2: A local attacker with control over GRUB\u0027s configuration can bypass lockdown restrictions when booting with Secure Boo...",
  "description": "A local attacker with control over GRUB\u0027s configuration can bypass lockdown restrictions when booting with Secure Boot and load an unsigned GRUB module, while GRUB continues to report lockdown is enabled.     The vulnerability is caused by insufficient validation of the MMIO base address passed to the GRUB serial command. GRUB does not validate that the base address corresponds to a UART device, rather than being an arbitrary memory address. This allows an attacker to trick GRUB into writing non-arbitrary data at an attacker-controlled address, including resetting\u00A0the grub_file_verifiers list in a way that disables the subsequent verification of loaded modules.",
  "published": "2026-10-02T11:17:39Z",
  "severity": "medium",
  "cvss": 6.4,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00115,
  "epssPercentile": 0.0153,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "grub2",
      "release": "Debian 14",
      "fixedVersion": "2.14-4",
      "fix": "DEBIAN-CVE-2026-97876",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-97876",
      "released": "2026-10-06T21:56:27Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}