UBUNTU-CVE-2026-16445
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.
UBUNTU-CVE-2026-16445
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:UBUNTU-CVE-2026-16445
dracut
Source reference: /affected/0/package/name
- Affected versions
- 051-1
Source reference:
/affected/0/versions - Fixed versions
- 051-1ubuntu0.1~esm1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "051-1ubuntu0.1~esm1"
}
]
}
],
"package": {
"name": "dracut",
"purl": "pkg:deb/ubuntu/dracut?arch=source&distro=esm-apps%2Fjammy",
"ecosystem": "Ubuntu:Pro:22.04:LTS"
},
"versions": [
"051-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16445.json"
},
"ecosystem_specific": {
"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"
}
],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #23727 · Revision 1
- Added to Heist Feed
- Publisher date