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CVE-2026-16445high7.5

Dracut: dracut: root code execution via dhcp options command injection in networkmanager initrd module

Impact

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.

Source excerpt · redhat

What to do

Avoid using the root=dhcp/netroot=dhcp/root=dhcp6/netroot=dhcp6 kernel command-line options — these cause dracut to trust the DHCP server's root-path option to determine the boot target. Configuring the netroot target explicitly on the kernel/PXE command line instead (e.g. netroot=nfs:<server>:<path> or netroot=iscsi:... with a literal value).

redhat guidance

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Red Hat · Red Hat Enterprise Linux 8

Other versions: affected

Version / rangeSource status
0:049-244.git20260529.el8_10 to before *unaffected
redhat version evidence

Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

Other versions: affected

Version / rangeSource status
0:049-138.git20220131.el8_4.1 to before *unaffected
redhat version evidence

Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Other versions: affected

Version / rangeSource status
0:049-138.git20220131.el8_4.1 to before *unaffected
redhat version evidence

Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

Other versions: affected

Version / rangeSource status
0:049-203.git20220511.el8_6.1 to before *unaffected
redhat version evidence

Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Other versions: affected

Version / rangeSource status
0:049-203.git20220511.el8_6.1 to before *unaffected
redhat version evidence

Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Other versions: affected

Version / rangeSource status
0:049-223.git20230119.el8_8.1 to before *unaffected
redhat version evidence

Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

Other versions: affected

Version / rangeSource status
0:049-223.git20230119.el8_8.1 to before *unaffected
redhat version evidence

Red Hat · Red Hat OpenShift Container Platform 4.12

Other versions: affected

Version / rangeSource status
412.86.202610250235-0 to before *unaffected
redhat version evidence

Red Hat · Red Hat Hardened Images

Other versions: affected

Version / rangeSource status
109-7.hum1 to before *unaffected
redhat version evidence

Red Hat · Red Hat Enterprise Linux 10

Other versions: unaffected

Version / rangeSource status
redhat version evidence

Original source description

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