What is CVE-2026-90890?

CVE-2026-90890 is a medium-severity vulnerability in Asrock Polychrome Sync/rgb For Mb, classified under Untrusted Pointer Dereference. CVSS score: 5.5/10. Published 2026-09-14.

How severe is CVE-2026-90890?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Asrock Polychrome Sync/rgb For Mb

CVE-2026-90890

ASRock Polychrome SYNC/RGB software utility developed by ASRock Inc. has an Untrusted Pointer Dereference vulnerability. Authenticated local attackers can send a specially crafted IOCTL request to cause the driver to dereference an unvalidated pointer, resulting in an operating system crash.

Published 2026-09-14 · last modified 2026-09-18.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.001 (3.0th percentile), scored 2026-10-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-822 — Untrusted Pointer Dereference

References

www.twcert.org.tw/tw/cp-132-11205-f6677-1.html (third-party-advisory)
www.twcert.org.tw/en/cp-139-11204-6b1c6-2.html (third-party-advisory)

Frequently asked questions

What is CVE-2026-90890?: CVE-2026-90890 is a medium-severity vulnerability in Asrock Polychrome Sync/rgb For Mb, classified under Untrusted Pointer Dereference. CVSS score: 5.5/10. Published 2026-09-14.
How severe is CVE-2026-90890?: Medium severity. CVSS v3 base score is 5.5 out of 10.