Microsoft Security Response Center

**What privileges are required by the attack to exploit this vulnerability?** An attacker needs to have support user privileges to be able to exploit this vulnerability.

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is uninitialized memory.

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is the contents of Kernel memory. An attacker could read the contents of Kernel memory from a user mode process.

**What type of information could be disclosed by this vulnerability?** Exploiting this vulnerability could allow the disclosure of initialized or uninitialized memory in the process heap.

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is the contents of Kernel memory. An attacker could read the contents of Kernel memory from a user mode process.

**How do I get the updated app?** The Microsoft Store will automatically update affected customers. Alternatively, customers can get the update immediately; see here for details. It is possible for customers to disable automatic updates for the Microsoft Store. The Microsoft Store will not automatically install this update for those customers. **My system is in a disconnected environment; is it vulnerable?** Customers using the Microsoft Store for Business and Microsoft Store for Education can get this update through their organizations. **How can I check if the update is installed?** If your device manufacturer preinstalled this app, package versions **2.0.23022.0** and later contain this update. If you purchased this app from the Microsoft Store, package versions **2.0.23022.0** and later contain this update. You can check the package version in PowerShell: `Get-AppxPackage -Name Microsoft.HEVCVideoExtension*`

**Is the Preview Pane an attack vector for this vulnerability?** No, the Preview Pane is not an attack vector.

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is uninitialized memory.

**Is the Preview Pane an attack vector for this vulnerability?** No, the Preview Pane is not an attack vector.

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is the contents of Kernel memory. An attacker could read the contents of Kernel memory from a user mode process.