{
  "cveId": "CVE-2023-39950",
  "url": "https://patchblox.com/security/cve/CVE-2023-39950",
  "summary": "CVE-2023-39950 is fixed in efibootguard on 1 platform, first by DEBIAN-CVE-2023-39950, released August 14, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "efibootguard: efibootguard is a simple UEFI boot loader with support for safely switching between current and updated partition sets",
  "description": "efibootguard is a simple UEFI boot loader with support for safely switching between current and updated partition sets. Insufficient or missing validation and sanitization of input from untrustworthy bootloader environment files can cause crashes and probably also code injections into \u0060bg_setenv\u0060) or programs using \u0060libebgenv\u0060. This is triggered when the affected components try to modify a manipulated environment, in particular its user variables. Furthermore, \u0060bg_printenv\u0060 may crash over invalid read accesses or report invalid results. Not affected by this issue is EFI Boot Guard\u0027s bootloader EFI binary. EFI Boot Guard release v0.15 contains required patches to sanitize and validate the bootloader environment prior to processing it in userspace. Its library and tools should be updated, so should programs statically linked against it. An update of the bootloader EFI executable is not required. The only way to prevent the issue with an unpatched EFI Boot Guard version is to avoid accesses to user variables, specifically modifications to them.",
  "published": "2023-08-14T21:15:13Z",
  "severity": "medium",
  "cvss": 5.2,
  "cvssVector": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L",
  "epss": 0.00423,
  "epssPercentile": 0.36884,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "efibootguard",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "0.13-2\u002Bdeb12u1",
      "fix": "DEBIAN-CVE-2023-39950",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-39950",
      "released": "2023-08-14T21:15:13Z"
    },
    {
      "platform": "linux",
      "product": "efibootguard",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "0.15-1",
      "fix": "DEBIAN-CVE-2023-39950",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-39950",
      "released": "2023-08-14T21:15:13Z"
    },
    {
      "platform": "linux",
      "product": "efibootguard",
      "release": "Debian 14",
      "fixedVersion": "0.15-1",
      "fix": "DEBIAN-CVE-2023-39950",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-39950",
      "released": "2023-08-14T21:15:13Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}