Medium [CVE-2026-54422] Credential extraction from bootc container deployment via /proc/1/root
This medium-severity Red Hat Linux advisory covers CVE-2026-54422 affecting Red Hat OpenShift Container Platform 4.
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Summary
In OpenStack Ironic Python Agent through 11.5.0, a malicious bootc container, when deployed using ironic-python-agent, may be able to extract the credentials used to download it. During bootc image deployment, the OCI registry pull secret was exposed to tenant-controlled container code running with host PID namespace visibility.
A malicious bootc container image could read the operator's registry credentials from the host filesystem via /proc/1/root, leading to credential disclosure. This could allow a project-scoped tenant to extract shared operator registry credentials, potentially affecting multiple nodes and projects.
Red Hat OpenStack Platform ships ironic-python-agent as part of its bare metal provisioning infrastructure. Deployments that use the bootc deploy_interface are affected by this vulnerability when operator-sourced registry pull secrets are used.
The bootc deployment feature was introduced in more recent versions of ironic-python-agent. Older versions of Red Hat OpenStack Platform that ship ironic-python-agent versions prior to 10.2.0 are not affected as they do not contain bootc deployment support.
Red Hat severity: Important — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N). Weakness: CWE-522.
Affected Red Hat products: Red Hat OpenShift Container Platform 4. Red Hat does not currently list a fixing RHSA for this CVE.
- 11.5.0
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
Mitigation checklist
- Operators can disable the bootc deploy_interface on their Ironic conductors by setting 'disable_bootc_deploy = true' in the ironic-python-agent configuration. Additionally, operators should avoid using operator-sourced registry pull secrets (driver_info.image_pull_secret or [deploy] image_server_user/password) with the bootc deploy_interface until the fix is applied. If the bootc deploy_interface must remain enabled, restrict which users can deploy arbitrary container images by limiting access to the baremetal provisioning API.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
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