Guest-to-host code execution via arbitrary address read
Published Jan 11, 2022 · Updated Jan 2, 2025
Remote code execution in the DirectX graphics kernel in Microsoft Windows 10 and Windows Server allows guest OS users to compromise the host. The VmBusWaitForSyncObjectFromGpu handler passes a guest-controlled fence-value pointer into DxgkWaitForSynchronizationObjectFromGpuInternal, enabling an arbitrary kernel-address read. Exploitation requires low-privileged code in a GPU-paravirtualized guest and can expose host kernel memory as a step toward host code execution.
Summary
What happened
Remote code execution in the DirectX graphics kernel in Microsoft Windows 10 and Windows Server allows guest OS users to compromise the host. The VmBusWaitForSyncObjectFromGpu handler passes a guest-controlled fence-value pointer into DxgkWaitForSynchronizationObjectFromGpuInternal, enabling an arbitrary kernel-address read. Exploitation requires low-privileged code in a GPU-paravirtualized guest and can expose host kernel memory as a step toward host code execution.
The record
- CVE
- CVE-2022-21912
- Published
- Jan 11, 2022
- Updated
- Jan 2, 2025
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 11, 2022CVE publishedPublication date reported by the CVE source.
- Jan 2, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.17763.0 <10.0.17763.2452
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Black Hat USA 2022 CVE-2022-21912 proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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