An information disclosure vulnerability exists when Visual Studio improperly discloses limited contents of uninitialized memory while compiling program database (PDB) files. An attacker who took advantage of this information disclosure could view uninitialized memory from the Visual Studio instance used to compile the PDB file.
To take advantage of the vulnerability, an attacker would require access to an affected PDB file created using a vulnerable version of Visual Studio. An attacker would have no way to force a developer to produce this information disclosure.
The security update addresses the vulnerability by correcting how PDB files are generated when a project is compiled.
## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Microsoft Visual Studio 2010 Service Pack 1 | | [KB4091346](https://patchblox.com/security/data/fix/microsoft/kb4091346.md) | Apr 10, 2018 | | Microsoft | Microsoft Visual Studio 2012 Update 5 | | [KB4089501](https://patchblox.com/security/data/fix/microsoft/kb4089501.md) | Apr 10, 2018 | | Microsoft | Microsoft Visual Studio 2013 Update 5 | | [KB4089283](https://patchblox.com/security/data/fix/microsoft/kb4089283.md) | Apr 10, 2018 | | Microsoft | Microsoft Visual Studio 2015 Update 3 | | [KB4087371](https://patchblox.com/security/data/fix/microsoft/kb4087371.md) | Apr 10, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo