# CVE-2018-8239: Windows GDI Information Disclosure Vulnerability CVE-2018-8239 is fixed in 12 products on 1 platform, first by KB4284880, released June 12, 2018. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2018-8239 - Priority: Urgent - CVSS: 4.4 (Important) - EPSS: 0.5729 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation More Likely - Published: Jun 12, 2018 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8239 ## Description

An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the user’s system.

There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage.

The security update addresses the vulnerability by correcting how the Windows GDI component handles objects in memory.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.2312 | [KB4284880](https://patchblox.com/security/data/fix/microsoft/kb4284880.md) | Jun 12, 2018 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.2312 | [KB4284880](https://patchblox.com/security/data/fix/microsoft/kb4284880.md) | Jun 12, 2018 | | Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.1155 | [KB4284874](https://patchblox.com/security/data/fix/microsoft/kb4284874.md) | Jun 12, 2018 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1155 | [KB4284874](https://patchblox.com/security/data/fix/microsoft/kb4284874.md) | Jun 12, 2018 | | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.492 | [KB4284819](https://patchblox.com/security/data/fix/microsoft/kb4284819.md) | Jun 12, 2018 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.492 | [KB4284819](https://patchblox.com/security/data/fix/microsoft/kb4284819.md) | Jun 12, 2018 | | Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.112 | [KB4284835](https://patchblox.com/security/data/fix/microsoft/kb4284835.md) | Jun 12, 2018 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.112 | [KB4284835](https://patchblox.com/security/data/fix/microsoft/kb4284835.md) | Jun 12, 2018 | | Microsoft | Windows Server 2016 | 14393.2312 | [KB4284880](https://patchblox.com/security/data/fix/microsoft/kb4284880.md) | Jun 12, 2018 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.2312 | [KB4284880](https://patchblox.com/security/data/fix/microsoft/kb4284880.md) | Jun 12, 2018 | | Microsoft | Windows Server, version 1709 (Server Core Installation) | 16299.492 | [KB4284819](https://patchblox.com/security/data/fix/microsoft/kb4284819.md) | Jun 12, 2018 | | Microsoft | Windows Server, version 1803 (Server Core Installation) | 17134.112 | [KB4284835](https://patchblox.com/security/data/fix/microsoft/kb4284835.md) | Jun 12, 2018 | --- Data as of 2026-11-07T06:34:28Z 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