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dracut EUVDEUVD-2026-54451

| CVE-2026-15816 HIGH
OS Command Injection (CWE-78)
2026-08-07 redhat GHSA-8pxm-cr92-crx8
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
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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

Adjacent-only DHCP vector, high complexity due to required boot-failure trigger, no authentication needed; root execution yields full CIA impact.

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
HIGH
qualitative
Red Hat
7.5 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

2
Analysis Generated
Aug 07, 2026 - 11:36 vuln.today
CVE Published
Aug 07, 2026 - 10:33 nvd
HIGH 7.5

DescriptionCVE.org

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.

AnalysisAI

Command injection in dracut's die() error-handling function allows an unauthenticated attacker on the adjacent network, controlling a rogue DHCP server, to execute arbitrary commands as root during initramfs boot-failure recovery. The flaw exists because error messages written into emergency hook shell scripts under the initramfs environment are not shell-quoted, and those messages can carry attacker-controlled data sourced from the DHCP ROOT_PATH option processed by the 40network module. No public exploit code or CISA KEV listing has been identified at time of analysis, but the exploitation primitive is conceptually straightforward for anyone with DHCP server control on the local network segment.

Technical ContextAI

dracut is the standard initramfs image generator used across Red Hat Enterprise Linux and its derivatives. When a system is configured for network root (e.g., iSCSI or NFS root) or processes DHCP at early boot, the 40network module (modules.d/40network/netroot.sh) parses DHCP response fields including ROOT_PATH. The die() function in modules.d/99base/dracut-lib.sh writes error messages-potentially incorporating ROOT_PATH content-into shell scripts placed in the initramfs emergency-hook directory. Because these strings are written without proper shell quoting, an attacker-supplied value containing command-substitution syntax ($(cmd) or backtick sequences) is later executed verbatim when dracut sources those hook scripts during boot-failure handling. CWE-78 (Improper Neutralization of Special Elements used in an OS Command) is the root cause: external data flows into a dynamically constructed shell script without sanitization or quoting, collapsing the boundary between data and code. The affected CPE strings span cpe:2.3:a:red_hat:red_hat_enterprise_linux_6 through 10, Red Hat Hardened Images, and Red Hat OpenShift Container Platform 4.

RemediationAI

Apply Red Hat-issued errata patches for the respective RHEL version as they become available through standard subscription channels (yum/dnf update dracut); monitor https://access.redhat.com/security/cve/CVE-2026-15816 and the Bugzilla entries at https://bugzilla.redhat.com/show_bug.cgi?id=2459963 and https://bugzilla.redhat.com/show_bug.cgi?id=2500889 for confirmed fix versions, which were not available in the data at time of analysis. As a primary compensating control, disable or remove dracut's 40network module on any system that does not require network-root boot (iSCSI, NFS, or PXE root) - this eliminates the DHCP ROOT_PATH input channel entirely; the trade-off is loss of network-boot capability. For environments that require network boot, enforce DHCP server authorization and restrict DHCP responses to trusted servers via network ACLs or 802.1X port control, preventing rogue DHCP servers from responding to client requests. On OpenShift Container Platform 4 nodes, apply Red Hat's platform-specific guidance as node initramfs generation may differ from standalone RHEL.

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Same weakness CWE-78 – OS Command Injection

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Same technique Command Injection

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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

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EUVD-2026-54451 vulnerability details – vuln.today
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