High · CVSS 7.4CVE-2026-16460

Bootc: ostree: bootc/ostree: staged deployments not revalidated against container signature policy before finalizationCVE-2026-16460

Answer in brief

CVE-2026-16460 records a High severity (CVSS 7.4) vulnerability in Bootc: ostree: bootc/ostree: staged deployments not revalidated against container signature policy before finalization. The current sources do not mark it as known exploited. The current feed maps Red Hat/bootc (generic), Red Hat/ostree (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 19, 2026Updated Oct 19, 2026Source checked Oct 19, 2026First seen by HOL Oct 19, 2026Material review Oct 19, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.4
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/bootc (generic), Red Hat/ostree (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Red Hat/bootcgeneric	*	Not reported
Red Hat/ostreegeneric	*	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Red Hat/bootc, Red Hat/ostree.
Review the reported fix. Source-reported workaround: 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.

Evidence timeline and material changes

Published upstream
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 19, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.