EUVD-2026-77365
GHSA-rv3j-88mf-j5v9
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local access with low-privilege user account required to send IOCTL; impact is strictly availability (kernel crash); no confidentiality or integrity impact.
Primary rating from Vendor (twcert).
CVSS VectorVendor: twcert
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Authenticated local attackers on Windows systems running ASRock Polychrome SYNC/RGB can crash the operating system by submitting a specially crafted IOCTL request to the product's installed kernel-mode driver, which dereferences an attacker-supplied pointer without validation (CWE-822). Both the Motherboard (MB) and VGA variants of the software are affected, as confirmed by TWCERT. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) a Windows system with ASRock Polychrome SYNC/RGB for MB or VGA installed and its kernel-mode driver actively loaded; (2) a local authenticated user account with at least low-level privileges (PR:L - standard, non-administrator account is sufficient per the CVSS vector); (3) the ability to open a device handle to the ASRock RGB driver and submit IOCTL requests. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N, score 6.8 Medium) accurately characterizes the risk: exploitation is strictly local, requires only a standard user account (PR:L), and yields a system crash with no data exposure or integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Users should consult ASRock's official update channel and the TWCERT advisories (https://www.twcert.org.tw/tw/cp-132-11205-f6677-1.html and https://www.twcert.org.tw/en/cp-139-11204-6b1c6-2.html) to obtain the patched release of ASRock Polychrome SYNC/RGB once available; the specific fixed version is not independently confirmed from the provided data. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-822 – Untrusted Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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