A flaw was found in bootc and ostree. Already-staged deployments are finalized without revalidating the deployment's container image against the current containers signature policy. Unsigned OS content staged under a prior permissive policy can remain bootable after policy is hardened to reject unsigned images, leading to full host compromise on reboot.

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Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

History

Mon, 19 Oct 2026 07:00:00 +0000

Type Values Removed Values Added
Description A flaw was found in bootc and ostree. Already-staged deployments are finalized without revalidating the deployment's container image against the current containers signature policy. Unsigned OS content staged under a prior permissive policy can remain bootable after policy is hardened to reject unsigned images, leading to full host compromise on reboot.
Title Bootc: ostree: bootc/ostree: staged deployments not revalidated against container signature policy before finalization
First Time appeared Redhat
Redhat enterprise Linux
Redhat hummingbird
Redhat openshift
Weaknesses CWE-345
CPEs cpe:/a:redhat:hummingbird:1
cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat hummingbird
Redhat openshift
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-10-19T06:40:50.466Z

Reserved: 2026-07-21T11:26:43.156Z

Link: CVE-2026-16460

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-19T07:16:31.253

Modified: 2026-10-19T07:16:31.253

Link: CVE-2026-16460

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-19T08:30:13Z

Weaknesses