UBUNTU-CVE-2026-15816
- Source
- https://ubuntu.com/security/CVE-2026-15816
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15816.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-15816
- Upstream
- Downstream
- Related
- Published
- 2026-08-07T11:17:00Z
- Modified
- 2026-09-15T03:15:04Z
- 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. The die() error-handling function writes its message into a shell script under the initramfs emergency-hook directory without properly shell-quoting it. When the message contains data derived from the DHCP ROOT_PATH option, an attacker on the adjacent network who controls a rogue DHCP server can inject a command-substitution sequence that executes as root the next time dracut sources its emergency hook scripts during standard boot-failure handling.
- References
-
- https://ubuntu.com/security/CVE-2026-15816
- https://www.cve.org/CVERecord?id=CVE-2026-15816
- https://access.redhat.com/security/cve/CVE-2026-15816
- https://bugzilla.redhat.com/show_bug.cgi?id=2459963
- https://bugzilla.redhat.com/show_bug.cgi?id=2500889
- https://github.com/dracutdevs/dracut/blob/master/modules.d/40network/netroot.sh
- https://github.com/dracutdevs/dracut/blob/master/modules.d/99base/dracut-lib.sh
- https://ubuntu.com/security/notices/USN-8758-1
Affected packages
Ubuntu:16.04:LTS
dracut
Package
- Name
- dracut
- Purl
- pkg:deb/ubuntu/dracut?arch=source&distro=xenial
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are 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"
}
]
}Ubuntu:18.04:LTS
dracut
Package
- Name
- dracut
- Purl
- pkg:deb/ubuntu/dracut?arch=source&distro=bionic
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
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"
}
]
}Ubuntu:20.04:LTS
dracut
Package
- Name
- dracut
- Purl
- pkg:deb/ubuntu/dracut?arch=source&distro=focal
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
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"
}
]
}Ubuntu:22.04:LTS
dracut
Package
- Name
- dracut
- Purl
- pkg:deb/ubuntu/dracut?arch=source&distro=jammy
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
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"
}
]
}Ubuntu:24.04:LTS
dracut
Package
- Name
- dracut
- Purl
- pkg:deb/ubuntu/dracut?arch=source&distro=noble
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Affected versions
Other
059-4ubuntu2
060+5-1ubuntu1
060+5-1ubuntu2
060+5-1ubuntu3
060+5-1ubuntu3.*
060+5-1ubuntu3.1
060+5-1ubuntu3.2
060+5-1ubuntu3.3
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"
}
]
}Ubuntu:26.04:LTS
dracut
Package
- Name
- dracut
- Purl
- pkg:deb/ubuntu/dracut?arch=source&distro=resolute
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed110-11ubuntu0.1
Affected versions
Other
108-3ubuntu3
108-8ubuntu1
109-5ubuntu1
109-7ubuntu1
109-9ubuntu1
109-11ubuntu1
110-1ubuntu2
110-3ubuntu1
110-5
110-7
110-10
110-11
Ecosystem specific
{
"availability": "No subscription required",
"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"
}
]
}