trustlets

About this tag
Trustlets are isolated processes that run within Windows Virtualization-Based Security (VBS) to protect sensitive data and system integrity. Discussions on WindowsForum cover trustlet security vulnerabilities, such as CVE-2026-20829, which involves information disclosure through TPM trustlets, and engineering insights from Microsoft's Dave Probert on how trustlets like LsaIso.exe (Credential Guard) operate in Isolated User Mode. These threads explore the boundary between the TPM and trustlet processes, the Secure Kernel's role in managing trustlet security, and the importance of Microsoft's confidence metrics in vulnerability advisories. The tag focuses on trustlet architecture, security patches, and implementation details within Windows 10 and later versions.

  1. CVE-2026-20829: TPM Trustlet Info Disclosure and Windows VBS Patch Strategy

    A terse entry in Microsoft’s Security Update Guide has drawn renewed attention to the fragile boundary between the Trusted Platform Module (TPM) ecosystem and the isolated “trustlet” processes that help Windows implement Virtualization‑Based Security. The item—tracked as CVE‑2026‑20829—was...

  2. More on Processes and Features in Windows 10 Isolated User Mode with Dave Probert

    In this final video in the Windows 10 Isolated User mode series Dave takes us through several engineering aspects associated with trustlets. First he describes how lsass.exe (the Local Security Authority Subsystem Service responsible for enforcing security on Windows) now can have a companion...
    • News
    • Thread
    • community credential guard dave probert engineering features innovation isolated user mode kernel security lsaiso.exe lsass.exe operating system process secure system security technology trustlets user mode video series windows 10 windows update
    • Replies: 0
    • Forum: Live RSS Feeds