CVE-2026-90891 PUBLISHED

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

Assigner: twcert
Reserved: 14.09.2026 Published: 14.09.2026 Updated: 14.09.2026

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.

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score: 6.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 5.5

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	ASRock
Product	ASRock Polychrome SYNC/RGB for MB
Versions	Default: unaffected affected from 0 to 1.0.118 (incl.)

Vendor	ASRock
Product	ASRock Polychrome SYNC/RGB for VGA
Versions	Default: unaffected affected from 0 to 2.0.219 (incl.)

Solutions

Update ASRock Polychrome SYNC/RGB for MB to a version later than 1.0.118 Update ASRock Polychrome SYNC/RGB for VGA to a version later than 2.0.219

References

Problem Types

CWE-1256 Improper Restriction of Software Interfaces to Hardware CWE