# CVE-2026-96868: Windows Kernel heap-based buffer overflow privilege escalation

Source: https://junglewise.ai/threats/cve-2026-96868-heap-based-buffer-overflow-in-windows-kernel-allows-an-authorized  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-26  
License: CC BY 4.0 with a link back

CVE-2026-96868 · Severity: high · CVSS 7 · Published 2026-10-13

A flaw in the Windows operating system's core kernel allows an authorized user to crash the system or gain higher-level access by exploiting a memory handling error. An attacker with legitimate local access could use this vulnerability to take control of the entire system and access sensitive data or install malware.

Technologies: [Microsoft Windows Kernel](https://junglewise.ai/threats/technologies/windows-kernel), [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-2026-96868 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-96868 being exploited in the wild.

**How severe is CVE-2026-96868?** High severity, with a CVSS score of 7, published 13 October 2026.

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

**Is there a fix for CVE-2026-96868?** 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-2026-96868 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-96868?** Check whether you run Microsoft Windows Kernel, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2 or one of the others listed. 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 heap-based buffer overflow in the Windows Kernel allows an authenticated local attacker to escalate privileges. The vulnerability requires existing user-level access to trigger, and successful exploitation grants system-level privileges. Microsoft has issued a security update addressing this issue.

## Affected products

- Microsoft Windows Kernel

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96868](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96868)

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