UBUNTU-CVE-2026-16445 (CVE-2026-16445)

Vulnerability from osv_ubuntu – Published: 2026-07-21 13:17 – Updated: 2026-09-15 00:56 – Source website
VLAI
Details

A flaw was found in dracut. A remote attacker on the adjacent network can exploit this vulnerability by providing specially crafted DHCP options, such as a malicious root-path, next-server, or bootfile name, to a system using dracut's NetworkManager-based initrd network module. These options are improperly handled and written into a temporary shell script without proper escaping, leading to command injection. This allows the attacker to achieve root code execution within the initramfs during system boot.

Severity
7.5 (High)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "dracut",
            "binary_version": "044+3-3"
          },
          {
            "binary_name": "dracut-config-generic",
            "binary_version": "044+3-3"
          },
          {
            "binary_name": "dracut-config-rescue",
            "binary_version": "044+3-3"
          },
          {
            "binary_name": "dracut-core",
            "binary_version": "044+3-3"
          },
          {
            "binary_name": "dracut-network",
            "binary_version": "044+3-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "dracut",
        "purl": "pkg:deb/ubuntu/dracut@044+3-3?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "043-2",
        "043-4",
        "044+3-1",
        "044+3-2",
        "044+3-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "dracut",
            "binary_version": "047-2"
          },
          {
            "binary_name": "dracut-config-generic",
            "binary_version": "047-2"
          },
          {
            "binary_name": "dracut-config-rescue",
            "binary_version": "047-2"
          },
          {
            "binary_name": "dracut-core",
            "binary_version": "047-2"
          },
          {
            "binary_name": "dracut-network",
            "binary_version": "047-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "dracut",
        "purl": "pkg:deb/ubuntu/dracut@047-2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "045+132-1",
        "047-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "dracut",
            "binary_version": "048+80-2"
          },
          {
            "binary_name": "dracut-config-generic",
            "binary_version": "048+80-2"
          },
          {
            "binary_name": "dracut-config-rescue",
            "binary_version": "048+80-2"
          },
          {
            "binary_name": "dracut-core",
            "binary_version": "048+80-2"
          },
          {
            "binary_name": "dracut-network",
            "binary_version": "048+80-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "dracut",
        "purl": "pkg:deb/ubuntu/dracut@048+80-2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "048+80-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "dracut",
            "binary_version": "051-1"
          },
          {
            "binary_name": "dracut-config-generic",
            "binary_version": "051-1"
          },
          {
            "binary_name": "dracut-config-rescue",
            "binary_version": "051-1"
          },
          {
            "binary_name": "dracut-core",
            "binary_version": "051-1"
          },
          {
            "binary_name": "dracut-live",
            "binary_version": "051-1"
          },
          {
            "binary_name": "dracut-network",
            "binary_version": "051-1"
          },
          {
            "binary_name": "dracut-squash",
            "binary_version": "051-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "dracut",
        "purl": "pkg:deb/ubuntu/dracut@051-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "051-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "dracut",
            "binary_version": "060+5-1ubuntu3.3"
          },
          {
            "binary_name": "dracut-config-generic",
            "binary_version": "060+5-1ubuntu3.3"
          },
          {
            "binary_name": "dracut-config-rescue",
            "binary_version": "060+5-1ubuntu3.3"
          },
          {
            "binary_name": "dracut-core",
            "binary_version": "060+5-1ubuntu3.3"
          },
          {
            "binary_name": "dracut-install",
            "binary_version": "060+5-1ubuntu3.3"
          },
          {
            "binary_name": "dracut-live",
            "binary_version": "060+5-1ubuntu3.3"
          },
          {
            "binary_name": "dracut-network",
            "binary_version": "060+5-1ubuntu3.3"
          },
          {
            "binary_name": "dracut-squash",
            "binary_version": "060+5-1ubuntu3.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "dracut",
        "purl": "pkg:deb/ubuntu/dracut@060+5-1ubuntu3.3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "059-4ubuntu2",
        "060+5-1ubuntu1",
        "060+5-1ubuntu2",
        "060+5-1ubuntu3",
        "060+5-1ubuntu3.1",
        "060+5-1ubuntu3.2",
        "060+5-1ubuntu3.3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "dracut",
            "binary_version": "110-11ubuntu0.1"
          },
          {
            "binary_name": "dracut-core",
            "binary_version": "110-11ubuntu0.1"
          },
          {
            "binary_name": "dracut-install",
            "binary_version": "110-11ubuntu0.1"
          },
          {
            "binary_name": "dracut-network",
            "binary_version": "110-11ubuntu0.1"
          },
          {
            "binary_name": "dracut-test",
            "binary_version": "110-11ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "dracut",
        "purl": "pkg:deb/ubuntu/dracut@110-11ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "108-3ubuntu3",
        "108-8ubuntu1",
        "109-5ubuntu1",
        "109-7ubuntu1",
        "109-9ubuntu1",
        "109-11ubuntu1",
        "110-1ubuntu2",
        "110-3ubuntu1",
        "110-5",
        "110-7",
        "110-10",
        "110-11",
        "110-11ubuntu0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in dracut. A remote attacker on the adjacent network can exploit this vulnerability by providing specially crafted DHCP options, such as a malicious root-path, next-server, or bootfile name, to a system using dracut\u0027s NetworkManager-based initrd network module. These options are improperly handled and written into a temporary shell script without proper escaping, leading to command injection. This allows the attacker to achieve root code execution within the initramfs during system boot.",
  "id": "UBUNTU-CVE-2026-16445",
  "modified": "2026-09-15T00:56:46Z",
  "published": "2026-07-21T13:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-16445"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-16445"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459963"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-16445"
  ]
}



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