# CVE-2018-8621: Windows Kernel Information Disclosure Vulnerability

CVE-2018-8621 is fixed in 7 products on 1 platform, first by KB4471328, released December 11, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-8621
- Priority: Routine
- CVSS: 4.7 (Important)
- EPSS: 0.0184
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: N/A
- Published: Dec 11, 2018
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8621

## Description

<p>An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the user’s system.</p> <p>An authenticated attacker could exploit this vulnerability by running a specially crafted application.</p> <p>The update addresses the vulnerability by correcting how the Windows kernel handles objects in memory.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 7 for 32-bit Systems Service Pack 1 |  | [KB4471328](https://patchblox.com/security/data/fix/microsoft/kb4471328.md) | Dec 11, 2018 |
| Microsoft | Windows 7 for 32-bit Systems Service Pack 1 |  | [KB4471318](https://patchblox.com/security/data/fix/microsoft/kb4471318.md) | Dec 11, 2018 |
| Microsoft | Windows 7 for x64-based Systems Service Pack 1 |  | [KB4471328](https://patchblox.com/security/data/fix/microsoft/kb4471328.md) | Dec 11, 2018 |
| Microsoft | Windows 7 for x64-based Systems Service Pack 1 |  | [KB4471318](https://patchblox.com/security/data/fix/microsoft/kb4471318.md) | Dec 11, 2018 |
| Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 |  | [KB4471328](https://patchblox.com/security/data/fix/microsoft/kb4471328.md) | Dec 11, 2018 |
| Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 |  | [KB4471318](https://patchblox.com/security/data/fix/microsoft/kb4471318.md) | Dec 11, 2018 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB4471328](https://patchblox.com/security/data/fix/microsoft/kb4471328.md) | Dec 11, 2018 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB4471318](https://patchblox.com/security/data/fix/microsoft/kb4471318.md) | Dec 11, 2018 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB4471328](https://patchblox.com/security/data/fix/microsoft/kb4471328.md) | Dec 11, 2018 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB4471318](https://patchblox.com/security/data/fix/microsoft/kb4471318.md) | Dec 11, 2018 |
| Microsoft | Windows Server 2012 |  | [KB4471330](https://patchblox.com/security/data/fix/microsoft/kb4471330.md) | Dec 11, 2018 |
| Microsoft | Windows Server 2012 |  | [KB4471326](https://patchblox.com/security/data/fix/microsoft/kb4471326.md) | Dec 11, 2018 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4471330](https://patchblox.com/security/data/fix/microsoft/kb4471330.md) | Dec 11, 2018 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4471326](https://patchblox.com/security/data/fix/microsoft/kb4471326.md) | Dec 11, 2018 |

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Data as of 2026-11-07T18:46:35Z 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

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