Severity by source
AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:A because attacker must be on the same Layer-2 segment to deliver DHCP; AC:H for the race against the legitimate DHCP server; PR:N/UI:N as boot-time DHCP needs no auth or user action; C/I/A:H from root code execution in initramfs.
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
6DescriptionCVE.org
A flaw was found in dracut. A remote attacker on the adjacent network can exploit this vulnerability by providing specially crafted DHCP (Dynamic Host Configuration Protocol) options, such as a malicious hostname, to a system using dracut's legacy DHCP path. These options are improperly handled and written into temporary shell scripts without proper escaping, leading to command injection. This allows the attacker to achieve root code execution within the initramfs, potentially compromising the system's boot and network behavior.
AnalysisAI
Root command injection in dracut's legacy DHCP path allows adjacent-network attackers to execute arbitrary commands inside the initramfs by sending crafted DHCP options (e.g., malicious hostname) that are written unescaped into temporary shell scripts. The flaw affects Red Hat Enterprise Linux 6 through 10, Red Hat Hardened Images, and OpenShift Container Platform 4, granting full system compromise during early boot. No public exploit identified at time of analysis, and EPSS is low (0.16%, 36th percentile), but SSVC rates technical impact as total.
Technical ContextAI
Dracut is the initramfs generation tool used by Red Hat-family distributions to assemble the minimal root filesystem executed before the real OS boots; its legacy DHCP module configures the network during this early phase by parsing DHCP server responses. The vulnerability is a classic CWE-78 OS Command Injection: DHCP option values (notably the hostname option) are interpolated into temporary shell scripts without quoting or sanitization, so shell metacharacters embedded by an attacker are evaluated by the initramfs shell. Because initramfs runs as PID 1 with full root privileges before SELinux policy and other userspace defenses fully apply, command execution at this stage yields complete control over the boot environment and any secrets unsealed during boot.
RemediationAI
Patch availability per vendor advisory; consult https://access.redhat.com/security/cve/CVE-2026-6893 and the linked errata for the exact fixed dracut RPM version for each RHEL major release and for OpenShift Container Platform 4 node images, then update dracut and regenerate the initramfs with 'dracut -f' so the fix is actually present in the boot image used at next reboot. If immediate patching is not possible, switch hosts off the legacy DHCP path by configuring dracut to use NetworkManager-in-initramfs (rd.neednet=1 with rd.net.dhcp.retry tuned and the 'network-manager' module instead of the legacy 'network' module), which avoids the vulnerable shell-script DHCP handling at the cost of a larger initramfs and a configuration change. As compensating controls, restrict initramfs DHCP to trusted VLANs by enabling DHCP snooping and port-security on access switches, disable PXE/network boot on systems that do not need it (trade-off: loses remote re-provisioning), or hardcode static IP configuration via 'ip=' kernel cmdline arguments for servers that don't require DHCP. Track remediation progress against Red Hat bug https://bugzilla.redhat.com/show_bug.cgi?id=2459963.
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
View allVendor StatusVendor
SUSE
Severity: Important| Product | Status |
|---|---|
| SLES15-SP5-CHOST-BYOS-SAP-CCloud | Affected |
| SLES15-SP6-CHOST-BYOS | Affected |
| SLES15-SP6-CHOST-BYOS-Aliyun | Affected |
| SLES15-SP6-CHOST-BYOS-Azure | Affected |
| SLES15-SP6-CHOST-BYOS-EC2 | Affected |
| SLES15-SP6-CHOST-BYOS-GCE | Affected |
| SLES15-SP6-CHOST-BYOS-GDC | Affected |
| SLES15-SP6-CHOST-BYOS-SAP-CCloud | Affected |
| SLES15-SP7-CHOST-BYOS-Aliyun | Affected |
| SLES15-SP7-CHOST-BYOS-Azure | Affected |
| SLES15-SP7-CHOST-BYOS-EC2 | Affected |
| SLES15-SP7-CHOST-BYOS-GCE | Affected |
| SLES15-SP7-CHOST-BYOS-GDC | Affected |
| SLES15-SP7-CHOST-BYOS-SAP-CCloud | Affected |
| SUSE Linux Enterprise Desktop 15 SP7 | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP7 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | Affected |
| SUSE Linux Enterprise Micro 5.3 | Affected |
| SUSE Linux Enterprise Micro 5.4 | Affected |
| SUSE Linux Enterprise Micro 5.5 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | Affected |
| SUSE Linux Enterprise Server 15 SP7 | Affected |
| SUSE Linux Enterprise Server 16.0 | Affected |
| SUSE Linux Enterprise Server 16.1 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | Affected |
| SUSE Linux Micro 6.0 | Affected |
| SUSE Linux Micro 6.1 | Affected |
| SUSE Linux Micro 6.2 | Affected |
| openSUSE Leap 16.0 | Affected |
| SLES15-SP3-CHOST-BYOS-Aliyun | Affected |
| SLES15-SP3-CHOST-BYOS-Azure | Affected |
| SLES15-SP3-CHOST-BYOS-EC2 | Affected |
| SLES15-SP3-CHOST-BYOS-GCE | Affected |
| SLES15-SP3-CHOST-BYOS-SAP-CCloud | Affected |
| SLES15-SP4-CHOST-BYOS | Affected |
| SLES15-SP4-CHOST-BYOS-Aliyun | Affected |
| SLES15-SP4-CHOST-BYOS-Azure | Affected |
| SLES15-SP4-CHOST-BYOS-EC2 | Affected |
| SLES15-SP4-CHOST-BYOS-GCE | Affected |
| SLES15-SP4-CHOST-BYOS-SAP-CCloud | Affected |
| SLES15-SP5-CHOST-BYOS-Aliyun | Affected |
| SLES15-SP5-CHOST-BYOS-Azure | Affected |
| SLES15-SP5-CHOST-BYOS-EC2 | Affected |
| SLES15-SP5-CHOST-BYOS-GCE | Affected |
| SLES15-SP5-CHOST-BYOS-GDC | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | Affected |
| SUSE Linux Enterprise Server 12 SP5 | Affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS | Affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security | Affected |
| SUSE Linux Enterprise Server 15 SP4 | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | Affected |
| SUSE Linux Enterprise Server 15 SP5 | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | Affected |
| SUSE Linux Enterprise Server 15 SP6 | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | Affected |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | Affected |
| SUSE Manager Proxy 4.3 | Affected |
| SUSE Manager Proxy LTS 4.3 | Affected |
| SUSE Manager Retail Branch Server 4.3 | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | Affected |
| SUSE Manager Server 4.3 | Affected |
| SUSE Manager Server LTS 4.3 | Affected |
| SUSE CaaS Platform 3.0 | Affected |
| SUSE CaaS Platform 4.0 | Affected |
| SUSE Enterprise Storage 6 | Affected |
| SUSE Enterprise Storage 7 | Affected |
| SUSE Enterprise Storage 7.1 | Affected |
| SUSE Linux Enterprise Desktop 12 SP3 | Affected |
| SUSE Linux Enterprise Desktop 12 SP4 | Affected |
| SUSE Linux Enterprise Desktop 15 | Affected |
| SUSE Linux Enterprise Desktop 15 SP1 | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP6 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | Affected |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | Affected |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | Affected |
| SUSE Linux Enterprise Micro 5.1 | Affected |
| SUSE Linux Enterprise Micro 5.2 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | Affected |
| SUSE Linux Enterprise Server 12 SP3 | Affected |
| SUSE Linux Enterprise Server 12 SP3-BCL | Affected |
| SUSE Linux Enterprise Server 12 SP3-ESPOS | Affected |
| SUSE Linux Enterprise Server 12 SP3-LTSS | Affected |
| SUSE Linux Enterprise Server 12 SP4 | Affected |
| SUSE Linux Enterprise Server 12 SP4-ESPOS | Affected |
| SUSE Linux Enterprise Server 12 SP4-LTSS | Affected |
| SUSE Linux Enterprise Server 15 | Affected |
| SUSE Linux Enterprise Server 15 SP1 | Affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | Affected |
| SUSE Linux Enterprise Server 15 SP2 | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | Affected |
| SUSE Linux Enterprise Server 15 SP3 | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | Affected |
| SUSE Linux Enterprise Server 15-LTSS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | Affected |
| SUSE Manager Proxy 4.0 | Affected |
| SUSE Manager Proxy 4.1 | Affected |
| SUSE Manager Proxy 4.2 | Affected |
| SUSE Manager Retail Branch Server 4.0 | Affected |
| SUSE Manager Retail Branch Server 4.1 | Affected |
| SUSE Manager Retail Branch Server 4.2 | Affected |
| SUSE Manager Server 4.0 | Affected |
| SUSE Manager Server 4.1 | Affected |
| SUSE Manager Server 4.2 | Affected |
| SUSE OpenStack Cloud 8 | Affected |
| SUSE OpenStack Cloud 9 | Affected |
| SUSE OpenStack Cloud Crowbar 8 | Affected |
| SUSE OpenStack Cloud Crowbar 9 | Affected |
| openSUSE Leap 15.3 | Affected |
| openSUSE Leap 15.4 | Affected |
| openSUSE Leap 15.5 | Affected |
| openSUSE Leap 15.6 | Affected |
| openSUSE Leap Micro 5.2 | Affected |
| openSUSE Leap Micro 5.3 | Affected |
| openSUSE Leap Micro 5.4 | Affected |
| openSUSE Leap Micro 5.5 | Affected |
| SLES-CHOST-BYOS-Aliyun | Affected |
| SLES-CHOST-BYOS-Azure | Affected |
| SLES-CHOST-BYOS-EC2 | Affected |
| SLES-CHOST-BYOS-GCE | Affected |
| SLES-CHOST-BYOS-GDC | Affected |
| SLES-CHOST-BYOS-SAP-CCloud | Affected |
| kiwi-templates-Minimal kiwi-templates-Minimal-Cloud-sap kiwi-templates-Minimal-MS-HyperV-sap kiwi-templates-Minimal-VMware-sap kiwi-templates-Minimal-kvm-and-xen-sap rancher/elemental-teal-rt/5.3 rancher/elemental-teal-rt/5.4 rancher/elemental-teal/5.3 rancher/elemental-teal/5.4 suse/hpc/warewulf4-x86_64/sle-hpc-node suse/sle-micro-rancher/5.2 suse/sle-micro-rancher/5.3 suse/sle-micro-rancher/5.4 suse/sle-micro/5.5 suse/sle-micro/base-5.5 suse/sles/15.3/libguestfs-tools:0.45.0 suse/sles/15.4/libguestfs-tools:0.49.0 suse/sles/15.5/libguestfs-tools:0.58.0 suse/sles/15.6/libguestfs-tools:1.1.1 suse/sles/15.7/libguestfs-tools:1.5.0 | Affected |
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-36110
GHSA-m789-mmmh-7vqc