UBUNTU-CVE-2026-16445

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Source
https://ubuntu.com/security/CVE-2026-16445
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16445.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-16445
Upstream
Downstream
Related
Published
2026-07-21T13:17:00Z
Modified
2026-09-28T22:45:15Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
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.

References

Affected packages

Ubuntu:Pro:22.04:LTS / dracut

Package

Name
dracut
Purl
pkg:deb/ubuntu/dracut?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
051-1ubuntu0.1~esm1

Affected versions

Other
051-1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "dracut",
            "binary_version":  "051-1ubuntu0.1~esm1"
        },
        {
            "binary_name":  "dracut-config-generic",
            "binary_version":  "051-1ubuntu0.1~esm1"
        },
        {
            "binary_name":  "dracut-config-rescue",
            "binary_version":  "051-1ubuntu0.1~esm1"
        },
        {
            "binary_name":  "dracut-core",
            "binary_version":  "051-1ubuntu0.1~esm1"
        },
        {
            "binary_name":  "dracut-live",
            "binary_version":  "051-1ubuntu0.1~esm1"
        },
        {
            "binary_name":  "dracut-network",
            "binary_version":  "051-1ubuntu0.1~esm1"
        },
        {
            "binary_name":  "dracut-squash",
            "binary_version":  "051-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16445.json"