Public vulnerability disclosure
CVE-2026-6893
Dracut: dracut: root code execution via dhcp options command injection
publishedCWE-78
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.
Technical severity7.5 highCVSS 3.1 · CNA: redhat
Published2026-06-10Source updated 2026-11-02
Collected2026-11-022 attributed sources
Fixes and workarounds
Workaround
To mitigate this issue, ensure that systems configured to obtain network settings via DHCP in the initramfs are only booted on trusted networks. This vulnerability requires an attacker to control a DHCP server on the adjacent network segment. If network configuration via DHCP is not strictly necessary during the initramfs phase, consider using static network configuration.
Source: CNA: redhatFix
RHSA-2026:62269: Red Hat Enterprise Linux Server (v. 7 ELS) RHSA-2026:65839: Red Hat OpenShift Container Platform 4.13 RHSA-2026:62409: Red Hat OpenShift Container Platform 4.14 RHSA-2026:62549: Red Hat OpenShift Container Platform 4.16 RHSA-2026:65851: Red Hat OpenShift Container Platform 4.18 RHSA-2026:63044: Red Hat OpenShift Container Platform 4.19 RHSA-2026:26532: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) RHSA-2026:26533: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9) RHSA-2026:57580: Red Hat Enterprise Linux BaseOS EUS (v. 10.0) RHSA-2026:26534: Red Hat Enterprise Linux BaseOS (v. 8) RHSA-2026:61252: Red Hat Enterprise Linux BaseOS E4S (v.8.8), Red Hat Enterprise Linux BaseOS TUS (v.8.8) RHSA-2026:57775: Red Hat Enterprise Linux BaseOS E4S (v.9.2) RHSA-2026:57785: Red Hat Enterprise Linux BaseOS E4S (v.9.4) RHSA-2026:57772: Red Hat Enterprise Linux BaseOS EUS (v.9.6) RHSA-2026:26713: Red Hat Hardened Images
Source: ADP: redhat-SADPWorkaround
To mitigate this issue, ensure that systems configured to obtain network settings via DHCP in the initramfs are only booted on trusted networks. This vulnerability requires an attacker to control a DHCP server on the adjacent network segment. If network configuration via DHCP is not strictly necessary during the initramfs phase, consider using static network configuration.
Source: ADP: redhat-SADPAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Red Hat Enterprise Linux 10 Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:107-7.el10_2; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 10.0 Extended Update Support Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:105-4.el10_0.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:004-413.el6_10; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:004-414.el6_10; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:033-577.el7_9; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:049-244.git20260529.el8_10; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:049-138.git20220131.el8_4.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:049-138.git20220131.el8_4.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:049-203.git20220511.el8_6.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:049-203.git20220511.el8_6.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:049-223.git20230119.el8_8.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:049-223.git20230119.el8_8.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9 Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:057-115.git20260527.el9_8; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:057-25.git20250717.el9_2.2; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:057-54.git20250423.el9_4.3; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.6 Extended Update Support Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:057-89.git20250311.el9_6.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.12 Red Hat openshift/ose-rhel-coreos-8
https://access.redhat.com/downloads/content/package-browser/ |
≥ 412.86.202610250235-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.13 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 413.92.202609080414-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.14 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 414.92.202609011250-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.15 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 415.92.202609140326-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.16 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 416.94.202609011112-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.17 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 417.94.202609191027-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.18 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 418.94.202609031320-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.18 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 418.94.202609171815-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.19 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 4.19.9.6.202609021231-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Hardened Images Red Hat dracut-main
https://catalog.redhat.com/software/containers/ |
≥ 109-6.hum1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 10 Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:107-7.el10_2; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat Enterprise Linux 10.0 Extended Update Support Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:105-4.el10_0.1; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:033-577.el7_9; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat Enterprise Linux 8 Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:049-244.git20260529.el8_10; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:049-223.git20230119.el8_8.1; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:049-223.git20230119.el8_8.1; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat Enterprise Linux 9 Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:057-115.git20260527.el9_8; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:057-25.git20250717.el9_2.2; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:057-54.git20250423.el9_4.3; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat Enterprise Linux 9.6 Extended Update Support Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:057-89.git20250311.el9_6.1; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat OpenShift Container Platform 4.13 Red Hat rhcos
https://access.redhat.com/downloads/content/package-browser/ |
≥ 413.92.202609080414-0; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat OpenShift Container Platform 4.14 Red Hat rhcos
https://access.redhat.com/downloads/content/package-browser/ |
≥ 414.92.202609011250-0; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat OpenShift Container Platform 4.16 Red Hat rhcos
https://access.redhat.com/downloads/content/package-browser/ |
≥ 416.94.202609011112-0; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat OpenShift Container Platform 4.18 Red Hat rhcos
https://access.redhat.com/downloads/content/package-browser/ |
≥ 418.94.202609031320-0; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat OpenShift Container Platform 4.19 Red Hat rhcos
https://access.redhat.com/downloads/content/package-browser/ |
≥ 4.19.9.6.202609021231-0; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat Hardened Images Red Hat dracut-main
https://access.redhat.com/downloads/content/package-browser/ |
≥ 109-6.hum1; < * (unaffected, rpm)
Other versions: affected |
ADP: redhat-SADP |
| Red Hat Enterprise Linux 6 Red Hat dracut
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
ADP: redhat-SADP |
| Red Hat OpenShift Container Platform 4 Red Hat openshift/ose-rhel-coreos-8
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
ADP: redhat-SADP |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.5 high |
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | CNA: redhat |
| 3.1 / 7.5 high |
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | ADP: redhat-SADP |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://access.redhat.com/errata/RHSA-2026:26532CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26533CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26534CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26713CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:57580CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:57772CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:57775CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:57785CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:61252CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:62269CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:62409CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:62549CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:63044CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:65839CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:65851CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:67857CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:69118CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:69119CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:70586CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:70615CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:74499CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:79114CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:90272CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-6893CNA: redhat · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2459963CNA: redhat · issue-tracking, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-6893ADP: redhat-SADP · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2459963ADP: redhat-SADP · issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6893.jsonADP: redhat-SADP · x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:62269ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:65839ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:62409ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:62549ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:65851ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:63044ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26532ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26533ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:57580ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26534ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:61252ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:57775ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:57785ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:57772ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26713ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
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