The VBoxDrvNtDeviceControl function in VBoxDrv.sys in Sun xVM VirtualBox before 1.6.4 uses the METHOD_NEITHER communication method for IOCTLs and does not properly validate a buffer associated with the Irp object, which allows local users to gain privileges by opening the \\.\VBoxDrv device and calling DeviceIoControl to send a crafted kernel address.
The VBoxDrvNtDeviceControl function in VBoxDrv.sys in Sun xVM VirtualBox before 1.6.4 uses the METHOD_NEITHER communication method for IOCTLs and does not properly validate a buffer associated with the Irp object, which allows local users to gain privileges by opening the \.\VBoxDrv device and calling DeviceIoControl to send a crafted kernel address.
为什么是这个 VPI(可解释·实验性)
VPI 计算依据
| 影响度 | 88.00 |
| 利用信号(KEV 收录) | ×1.50 |
| VPI | 100.00 |
VPI 公式 vpi-v1
必要措施
Apply updates per vendor instructions.
| 来源 | CVSS 版本 | 基础评分 | 严重程度 | 向量字符串 | 评估日期 |
|---|---|---|---|---|---|
| NVDNIST | 3.1 | 8.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | 2026. 04. 20. |
| NVDNIST | 2.0 | 7.2 |
| AV:L/AC:L/Au:N/C:C/I:C/A:C |
| 2026. 04. 20. |