Skip to main content

dracut EUVDEUVD-2026-36110

| CVE-2026-6893 HIGH
OS Command Injection (CWE-78)
2026-06-10 redhat GHSA-m789-mmmh-7vqc
RCE Command Injection Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 9 Red Hat Openshift Container Platform 4 Red Hat Hardened Images Red Hat
7.5
CVSS 3.1 · Vendor: redhat
Share

Severity by source

Vendor (redhat) PRIMARY
7.5 HIGH
AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
7.5 HIGH

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.

3.1 AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
8.8 HIGH
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat
8.8 HIGH
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

6
Analysis Updated
Jun 16, 2026 - 19:28 vuln.today
v3 (cvss_changed)
Analysis Updated
Jun 16, 2026 - 19:28 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Jun 16, 2026 - 19:22 vuln.today
cvss_changed
CVSS changed
Jun 16, 2026 - 19:22 NVD
8.8 (HIGH) 7.5 (HIGH)
Analysis Generated
Jun 10, 2026 - 20:30 vuln.today
CVE Published
Jun 10, 2026 - 19:49 nvd
HIGH 8.8

DescriptionCVE.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.

More in Red Hat Enterprise Linux 10

View all
CVE-2026-18663 MEDIUM
5.9 Aug 12

Heap corruption via double-free in 389-ds-base's LDAP control parsing allows an unauthenticated remote attacker to crash
CVE-2026-4631 CRITICAL POC
9.8 Apr 07

Remote code execution in Cockpit's web interface allows unauthenticated attackers to execute arbitrary commands on the h
CVE-2026-4480 CRITICAL POC
9.0 May 26

Remote code execution in Samba's printing subsystem allows remote attackers to inject arbitrary shell commands via craft
CVE-2026-18922 CRITICAL
9.8 Sep 07

Authentication bypass in 389 Directory Server (shipped as Red Hat Directory Server 11-13 and within RHEL 6-10) lets remo
CVE-2026-14544 CRITICAL
9.8 Jul 03

Remote code execution and privilege escalation in HPLIP (HP Linux Imaging and Printing) affects the hpcups print filter

CVE-2026-76578 CRITICAL
9.8 Sep 07

Unauthenticated privilege escalation in FreeIPA (Red Hat Identity Management) allows a remote attacker to gain genuine a
CVE-2026-5121 HIGH
7.5 Mar 30

Remote code execution in libarchive on 32-bit systems allows unauthenticated attackers to execute arbitrary code via spe
CVE-2026-28369 CRITICAL
9.1 Mar 27

HTTP request smuggling in Undertow (the embedded web server underpinning JBoss EAP, Red Hat Data Grid, and Apache Camel

CVE-2026-28368 CRITICAL
9.1 Mar 27

HTTP request smuggling in Red Hat Undertow allows remote unauthenticated attackers to bypass front-end security controls
CVE-2026-33845 CRITICAL
9.1 Apr 30

Out-of-bounds read in the GnuTLS DTLS handshake reassembly logic lets remote unauthenticated attackers trigger an intege
CVE-2026-28367 CRITICAL
9.1 Mar 27

HTTP request smuggling in Undertow allows remote unauthenticated attackers to send `\r\r\r` as a header block terminator
CVE-2026-16526 HIGH
8.8 Jul 30

Local privilege escalation in Performance Co-Pilot (PCP) on Red Hat Enterprise Linux 6 through 10 and OpenShift Containe

Same weakness CWE-78 – OS Command Injection

View all
CVE-2019-15107 CRITICAL POC
9.8
CVE-2024-51378 CRITICAL POC
9.8
CVE-2014-6271 CRITICAL POC
9.8
CVE-2018-11138 CRITICAL POC
9.8
CVE-2014-6278 HIGH POC
8.8
CVE-2017-6334 HIGH POC
8.8
CVE-2024-50603 CRITICAL POC
10.0
CVE-2024-9474 MEDIUM POC
6.9

Same technique RCE

View all
CVE-2021-44228 CRITICAL POC
10.0
CVE-2017-7269 CRITICAL POC
9.8
CVE-2022-47966 CRITICAL POC
9.8
CVE-2012-4681 CRITICAL POC
9.8
CVE-2023-3519 CRITICAL POC
9.8
CVE-2015-5119 CRITICAL POC
9.8
CVE-2016-4117 CRITICAL POC
9.8
CVE-2015-3113 CRITICAL POC
9.8

Vendor 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

Share

EUVD-2026-36110 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy