CVE-2026-90891 — MEDIUM (5.5)

Vulnerability 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.

CVSS Score

5.5

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Related Weaknesses (CWE)

CWE-1256

References

FAQ

What is CVE-2026-90891?

CVE-2026-90891 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...

How severe is CVE-2026-90891?

CVE-2026-90891 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-90891?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.