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Vulnerability · Published Aug 7, 2026 · Assigned by redhat

CVE-2026-15816Dracut: dracut: root code execution via unescaped error message written to sourced emergency hook script in die()

High 7.5

In plain English

A high-severity OS command injection in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 68.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10dracut107-9.el10_2ALSA-2026:54576
AlmaLinux:8dracut049-246.git20260728.el8_10ALSA-2026:54575
AlmaLinux:9dracut057-120.git20260728.el9_8ALSA-2026:54571
AlmaLinux:10dracut-caps107-9.el10_2ALSA-2026:54576
AlmaLinux:8dracut-caps049-246.git20260728.el8_10ALSA-2026:54575
AlmaLinux:9dracut-caps057-120.git20260728.el9_8ALSA-2026:54571
AlmaLinux:10dracut-config-generic107-9.el10_2ALSA-2026:54576
AlmaLinux:8dracut-config-generic049-246.git20260728.el8_10ALSA-2026:54575
AlmaLinux:9dracut-config-generic057-120.git20260728.el9_8ALSA-2026:54571
AlmaLinux:10dracut-config-rescue107-9.el10_2ALSA-2026:54576
AlmaLinux:8dracut-config-rescue049-246.git20260728.el8_10ALSA-2026:54575
AlmaLinux:9dracut-config-rescue057-120.git20260728.el9_8ALSA-2026:54571
AlmaLinux:10dracut-live107-9.el10_2ALSA-2026:54576
AlmaLinux:8dracut-live049-246.git20260728.el8_10ALSA-2026:54575
AlmaLinux:9dracut-live057-120.git20260728.el9_8ALSA-2026:54571
AlmaLinux:10dracut-network107-9.el10_2ALSA-2026:54576
AlmaLinux:8dracut-network049-246.git20260728.el8_10ALSA-2026:54575
AlmaLinux:9dracut-network057-120.git20260728.el9_8ALSA-2026:54571
AlmaLinux:10dracut-squash107-9.el10_2ALSA-2026:54576
AlmaLinux:8dracut-squash049-246.git20260728.el8_10ALSA-2026:54575
AlmaLinux:9dracut-squash057-120.git20260728.el9_8ALSA-2026:54571
AlmaLinux:10dracut-tools107-9.el10_2ALSA-2026:54576
AlmaLinux:8dracut-tools049-246.git20260728.el8_10ALSA-2026:54575
AlmaLinux:9dracut-tools057-120.git20260728.el9_8ALSA-2026:54571
Debian:12dracutno fix listedDEBIAN-CVE-2026-15816
Debian:13dracutno fix listedDEBIAN-CVE-2026-15816
Debian:14dracut112-2DEBIAN-CVE-2026-15816
Rocky Linux:10dracut0:107-9.el10_2RLSA-2026:54576
Rocky Linux:8dracut0:049-246.git20260728.el8_10RLSA-2026:54575
Rocky Linux:9dracut0:057-120.git20260728.el9_8RLSA-2026:54571
Ubuntu:24.04:LTSdracut060+5-1ubuntu3.4USN-8828-1
Ubuntu:24.04:LTSdracut060+5-1ubuntu3.4UBUNTU-CVE-2026-15816
Ubuntu:26.04:LTSdracut110-11ubuntu0.1USN-8828-1
Ubuntu:26.04:LTSdracut110-11ubuntu0.1USN-8758-1
Ubuntu:26.04:LTSdracut110-11ubuntu0.1UBUNTU-CVE-2026-15816

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION see references
Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Red Hat OpenShift Container Platform 4.12 see references
Red Hat Red Hat OpenShift Container Platform 4.13 see references
Red Hat Red Hat OpenShift Container Platform 4.14 see references
Red Hat Red Hat OpenShift Container Platform 4.15 see references
Red Hat Red Hat OpenShift Container Platform 4.16 see references
Red Hat Red Hat OpenShift Container Platform 4.17 see references
Red Hat Red Hat OpenShift Container Platform 4.18 see references
Red Hat Red Hat OpenShift Container Platform 4.18 see references
Red Hat Red Hat OpenShift Container Platform 4.19 see references
Red Hat Red Hat OpenShift Container Platform 4.20 see references
Red Hat Red Hat OpenShift Container Platform 4.21 see references
Red Hat Red Hat OpenShift Container Platform 4.22 see references
Red Hat Red Hat OpenShift Container Platform 4.22 see references

Weakness: CWE-78 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References