EUVD-2026-56319
GHSA-427p-rcmg-w2hf
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector with low-privilege account required; AC:H reflects race condition prerequisite; SYSTEM-level attainment yields full C/I/A impact within unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Windows Graphics Kernel allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Graphics Kernel exposes a broad range of Windows 10, Windows 11, and Windows Server editions to a use-after-free memory corruption flaw (CWE-416). An attacker holding a low-privileged local account who can satisfy a race condition in the kernel graphics subsystem can gain SYSTEM-level control of the affected host. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a low-privileged authenticated local account on the target system (PR:L per CVSS vector), meaning the attacker must already have interactive or remote-desktop access as a standard user - unauthenticated remote exploitation is not possible. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.0 is tempered by AC:H, reflecting the race condition or memory-layout prerequisite that prevents trivial, reliable exploitation; however, the full C:H/I:H/A:H impact upon success underscores that exploitation yields complete host compromise. … 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 | Apply the Microsoft-released security updates via Windows Update, Windows Server Update Services (WSUS), or the Microsoft Update Catalog, targeting the minimum build thresholds documented in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-61346. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and enumerate all Windows 10, Windows 11, and Windows Server systems in your environment, prioritizing those with elevated user access or external user connectivity. …
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
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