Red Hat Security Advisory: OpenShift Container Platform 4.19.46 bug fix and security update
Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the container images for Red Hat OpenShift Container Platform 4.19.46. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:63043 Space precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes: https://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html/release_notes/ Security Fix(es): * dracut: dracut: Root code execution via DHCP options command injection (CVE-2026-6893) * librenswan: IKEv2 Denial of Service via malformed fragmentation (CVE-2026-12413) * dracut: dracut: root code execution via unescaped error message written to sourced emergency hook script in die() (CVE-2026-15816) * sg3_utils: sg3_utils: arbitrary command execution via udev property injection in sg_inq --export (CVE-2026-16313) * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in init_unpack() (CVE-2026-14164) * libreswan: badly formatted X.509 certificate can cause an assertion failure that crashes the daemon process (CVE-2026-14957) * librenswan: IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload (CVE-2026-50721) * librenswan: IKEv2 Denial of Service via RSA-SHA1 (PKCS#1 RSASSA-PKCS1-v1_5) authentication payload (CVE-2026-50722) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. All OpenShift Container Platform 4.19 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli.
AI Analysis
Technical Summary
CVE-2026-6893 is a high-severity vulnerability in dracut's legacy DHCP client script (dhclient-script.sh) where specially crafted DHCP options, such as malicious hostnames, are improperly handled and written into temporary shell scripts without proper escaping. This leads to command injection, allowing an attacker on the adjacent network segment to achieve root code execution within the initramfs. This compromises the system's boot and network setup processes. The vulnerability primarily affects systems configured to use DHCP during the initramfs phase. Red Hat has released an update including patched dracut RPMs to fix this issue.
Potential Impact
Successful exploitation allows an attacker controlling a DHCP server on the adjacent network to execute arbitrary commands as root during the initramfs boot phase. This can compromise system integrity, confidentiality, and availability by allowing unauthorized code execution, potentially disrupting boot or network behavior.
Mitigation Recommendations
A patch is available and should be applied by updating the affected dracut RPM packages as provided by Red Hat. Until patched, systems using DHCP for network configuration during initramfs should only be booted on trusted networks. If DHCP is not required during initramfs, consider using static network configuration to avoid exposure.
Red Hat Security Advisory: OpenShift Container Platform 4.19.46 bug fix and security update
Description
Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the container images for Red Hat OpenShift Container Platform 4.19.46. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:63043 Space precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes: https://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html/release_notes/ Security Fix(es): * dracut: dracut: Root code execution via DHCP options command injection (CVE-2026-6893) * librenswan: IKEv2 Denial of Service via malformed fragmentation (CVE-2026-12413) * dracut: dracut: root code execution via unescaped error message written to sourced emergency hook script in die() (CVE-2026-15816) * sg3_utils: sg3_utils: arbitrary command execution via udev property injection in sg_inq --export (CVE-2026-16313) * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in init_unpack() (CVE-2026-14164) * libreswan: badly formatted X.509 certificate can cause an assertion failure that crashes the daemon process (CVE-2026-14957) * librenswan: IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload (CVE-2026-50721) * librenswan: IKEv2 Denial of Service via RSA-SHA1 (PKCS#1 RSASSA-PKCS1-v1_5) authentication payload (CVE-2026-50722) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. All OpenShift Container Platform 4.19 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-6893 is a high-severity vulnerability in dracut's legacy DHCP client script (dhclient-script.sh) where specially crafted DHCP options, such as malicious hostnames, are improperly handled and written into temporary shell scripts without proper escaping. This leads to command injection, allowing an attacker on the adjacent network segment to achieve root code execution within the initramfs. This compromises the system's boot and network setup processes. The vulnerability primarily affects systems configured to use DHCP during the initramfs phase. Red Hat has released an update including patched dracut RPMs to fix this issue.
Potential Impact
Successful exploitation allows an attacker controlling a DHCP server on the adjacent network to execute arbitrary commands as root during the initramfs boot phase. This can compromise system integrity, confidentiality, and availability by allowing unauthorized code execution, potentially disrupting boot or network behavior.
Mitigation Recommendations
A patch is available and should be applied by updating the affected dracut RPM packages as provided by Red Hat. Until patched, systems using DHCP for network configuration during initramfs should only be booted on trusted networks. If DHCP is not required during initramfs, consider using static network configuration to avoid exposure.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:26533
- Cve Count
- 1
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a32cf8f9f87a2db092aa6cf
Added to database: 06/17/2026, 16:47:11 UTC
Last enriched: 08/16/2026, 17:32:28 UTC
Last updated: 09/15/2026, 22:01:36 UTC
Views: 189
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