CVE-2026-6893: Dracut: dracut: root code execution via dhcp options command injection

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-10 · updated 2026-10-27
Weakness: CWE-78

Description

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.

Affected products

Red Hat OpenShift Container Platform 4.18: all versions — fixed in 418.94.202609031320-0
Red Hat Enterprise Linux 10: all versions — fixed in 0:107-7.el10_2
Red Hat Enterprise Linux 10.0 Extended Update Support: all versions — fixed in 0:105-4.el10_0.1
Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION: all versions — fixed in 0:004-413.el6_10
Red Hat Enterprise Linux 7 Extended Lifecycle Support: all versions — fixed in 0:033-577.el7_9
Red Hat Enterprise Linux 8: all versions — fixed in 0:049-244.git20260529.el8_10
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support: all versions — fixed in 0:049-138.git20220131.el8_4.1
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On: all versions — fixed in 0:049-138.git20220131.el8_4.1
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: all versions — fixed in 0:049-203.git20220511.el8_6.1
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On: all versions — fixed in 0:049-203.git20220511.el8_6.1
Red Hat Enterprise Linux 8.8 Telecommunications Update Service: all versions — fixed in 0:049-223.git20230119.el8_8.1
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions: all versions — fixed in 0:049-223.git20230119.el8_8.1
Red Hat Enterprise Linux 9: all versions — fixed in 0:057-115.git20260527.el9_8
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions: all versions — fixed in 0:057-25.git20250717.el9_2.2
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions: all versions — fixed in 0:057-54.git20250423.el9_4.3
Red Hat Enterprise Linux 9.6 Extended Update Support: all versions — fixed in 0:057-89.git20250311.el9_6.1
Red Hat Hardened Images: all versions — fixed in 109-6.hum1
Red Hat OpenShift Container Platform 4.12: all versions — fixed in 412.86.202610250235-0
Red Hat OpenShift Container Platform 4.13: all versions — fixed in 413.92.202609080414-0
Red Hat OpenShift Container Platform 4.14: all versions — fixed in 414.92.202609011250-0
Red Hat OpenShift Container Platform 4.15: all versions — fixed in 415.92.202609140326-0
Red Hat OpenShift Container Platform 4.16: all versions — fixed in 416.94.202609011112-0
Red Hat OpenShift Container Platform 4.17: all versions — fixed in 417.94.202609191027-0
Red Hat OpenShift Container Platform 4.19: all versions — fixed in 4.19.9.6.202609021231-0

How to fix

Upgrade to a fixed version: Red Hat OpenShift Container Platform 4.18 418.94.202609031320-0; Red Hat Enterprise Linux 10 0:107-7.el10_2; Red Hat Enterprise Linux 10.0 Extended Update Support 0:105-4.el10_0.1; Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION 0:004-413.el6_10; Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:033-577.el7_9; Red Hat Enterprise Linux 8 0:049-244.git20260529.el8_10; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:049-138.git20220131.el8_4.1; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:049-138.git20220131.el8_4.1; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:049-203.git20220511.el8_6.1; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:049-203.git20220511.el8_6.1; Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:049-223.git20230119.el8_8.1; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:049-223.git20230119.el8_8.1. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-6893 or the next vulnerability affects your stack