# CVE-2026-83796: Microsoft Windows Kernel use-after-free privilege elevation

Source: https://junglewise.ai/threats/cve-2026-83796-use-after-free-in-windows-kernel-allows-an-authorized-attacker-to  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-83796 · Severity: high · CVSS 7.8 · Published 2026-10-13

Windows Kernel contains a use-after-free memory vulnerability that allows an authorized local user to escalate their privileges to administrator or system level. A successful exploit could give an attacker full control over a compromised computer, enabling them to install malware, steal data, or disrupt operations.

Technologies: [Microsoft Windows Kernel](https://junglewise.ai/threats/technologies/windows-kernel), [Microsoft Windows 11 23h2](https://junglewise.ai/threats/technologies/windows-11-23h2), [Microsoft Windows 11 24h2](https://junglewise.ai/threats/technologies/windows-11-24h2), [Microsoft Windows 11 25h2](https://junglewise.ai/threats/technologies/windows-11-25h2), [Microsoft Windows 11 26h2](https://junglewise.ai/threats/technologies/windows-11-26h2), [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-83796 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-83796 being exploited in the wild.

**How severe is CVE-2026-83796?** High severity, with a CVSS score of 7.8, published 13 October 2026.

**Which products and versions are affected?** Microsoft Windows Kernel <UNKNOWN>.

**Is there a fix for CVE-2026-83796?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-83796 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-83796?** Check whether you run Microsoft Windows Kernel, Microsoft Windows 11 23h2, Microsoft Windows 11 24h2 or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A use-after-free vulnerability in the Windows Kernel allows an authenticated local attacker to execute arbitrary code with elevated privileges. The vulnerability requires prior local access and authentication, but no user interaction. Exploitation results in privilege escalation from a standard user context to SYSTEM or administrator level.

## Affected products

- Microsoft Windows Kernel <UNKNOWN>

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83796](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83796)

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