VB-Audio Voicemeeter & Matrix Drivers DoS via Improper FILE_OBJECT FsContext Initialization

VB-Audio Voicemeeter, Voicemeeter Banana, and Voicemeeter Potato (versions ending in 1.1.1.9, 2.1.1.9, and 3.1.1.9 and earlier, respectively), as well as VB-Audio Matrix and Matrix Coconut (versions ending in 1.0.2.2 and 2.0.2.2 and earlier, respectively), contain a vulnerability in their virtual audio drivers (vbvoicemeetervaio64*.sys, vbmatrixvaio64*.sys, vbaudio_vmauxvaio*.sys, vbaudio_vmvaio*.sys, and vbaudio_vmvaio3*.sys). When a handle is opened with a special file attribute value, the drivers improperly initialize FILE_OBJECT->FsContext to a non-pointer magic value. If subsequent operations are not handled by the VB-Audio driver and are forwarded down the audio driver stack (e.g., via PortCls to ks.sys), the invalid FsContext value can be dereferenced, causing a kernel crash (BSoD), typically SYSTEM_SERVICE_EXCEPTION with STATUS_ACCESS_VIOLATION. This flaw allows a local unprivileged user to trigger a denial-of-service on affected Windows systems.

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使用未经初始化的指针

VB-Audio Voicemeeter和VB-Audio Matrix 缓冲区错误漏洞

VB-Audio Voicemeeter和VB-Audio Matrix都是法国VB-Audio公司的产品。VB-Audio Voicemeeter是一个虚拟音频调音台软件。VB-Audio Matrix是一个实时音频路由软件。 VB-Audio Voicemeeter和VB-Audio Matrix存在缓冲区错误漏洞，该漏洞源于虚拟音频驱动程序未正确初始化FILE_OBJECT->FsContext，可能导致内核崩溃和拒绝服务。

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