An Elevation of Privilege vulnerability exists in Windows Subsystem for Linux when it fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could execute arbitrary code and take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
To exploit the vulnerability, an attacker would first have to log on to a target system and then run a specially crafted application.
The security update addresses the vulnerability by correcting how Windows Subsystem for Linux handles objects in memory.
## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.345 | [KB4462919](https://patchblox.com/security/data/fix/microsoft/kb4462919.md) | Oct 9, 2018 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.345 | [KB4462919](https://patchblox.com/security/data/fix/microsoft/kb4462919.md) | Oct 9, 2018 | | Microsoft | Windows Server, version 1803 (Server Core Installation) | 17134.345 | [KB4462919](https://patchblox.com/security/data/fix/microsoft/kb4462919.md) | Oct 9, 2018 | --- Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo