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.
History

Wed, 21 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Bootc
Bootc bootc
Redhat hardened Images
Redhat openshift Container Platform
Vendors & Products Bootc
Bootc bootc
Redhat hardened Images
Redhat openshift Container Platform

Mon, 19 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 19 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

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

Updated: 2026-10-21T18:56:55.605Z

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

Link: CVE-2026-16460

cve-icon Vulnrichment

Updated: 2026-10-19T17:30:18.847Z

cve-icon NVD

Status : Awaiting Analysis

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

Modified: 2026-10-21T19:17:02.333

Link: CVE-2026-16460

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-18T00:00:00Z

Links: CVE-2026-16460 - Bugzilla