ASRock｜ASRock Polychrome SYNC/RGB software utility - Improper Access Control (CVE-2026-90891) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90891

ASRock｜ASRock Polychrome SYNC/RGB software utility - Improper Access Control

Answer in brief

CVE-2026-90891 records a Unknown severity vulnerability in ASRock｜ASRock Polychrome SYNC/RGB software utility - Improper Access Control. The current sources do not mark it as known exploited. The current feed maps ASRock/ASRock Polychrome SYNC/RGB for MB (generic), ASRock/ASRock Polychrome SYNC/RGB for VGA (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 Sep 14, 2026Updated Sep 14, 2026Source checked Sep 14, 2026First seen by HOL Sep 14, 2026Material review Sep 14, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. 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 ASRock/ASRock Polychrome SYNC/RGB for MB (generic), ASRock/ASRock Polychrome SYNC/RGB for VGA (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
ASRock/ASRock Polychrome SYNC/RGB for MBgeneric	0	Not reported
ASRock/ASRock Polychrome SYNC/RGB for VGAgeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for ASRock/ASRock Polychrome SYNC/RGB for MB, ASRock/ASRock Polychrome SYNC/RGB for VGA.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 14, 2026

Sources and claim methodology

Upstream source description

ASRock Polychrome SYNC/RGB software utility developed by ASRock Inc. has an Improper Access Control vulnerability. Authenticated local attackers can send a specially crafted IOCTL request to cause the driver to write to improperly restricted I/O ports, resulting in a forced operating system reboot.

Quoted source text, attributed separately from HOL analysis.