# CVE-2026-119947: Windows Hyper-V use after free privilege escalation

Source: https://junglewise.ai/threats/cve-2026-119947-use-after-free-in-windows-hyper-v-allows-an-authorized-attacker  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-119947 · Severity: high · CVSS 7.5 · Published 2026-11-10

Windows Hyper-V, Microsoft's virtualization platform, contains a use-after-free vulnerability that allows an authorized attacker to elevate their privileges on a host system. An attacker who has already gained local access can exploit this flaw to run code with higher privileges, potentially gaining complete control of the virtualization infrastructure.

Technologies: [Microsoft Hyper-V](https://junglewise.ai/threats/technologies/hyper-v). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-119947 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-119947 being exploited in the wild.

**How severe is CVE-2026-119947?** High severity, with a CVSS score of 7.5, published 10 November 2026.

**Which products and versions are affected?** Microsoft Hyper-V.

**Is there a fix for CVE-2026-119947?** 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-2026-119947 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-119947?** Check whether you run Microsoft Hyper-V. 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 condition in Windows Hyper-V allows privilege escalation when an authenticated local attacker triggers improper memory management in the virtualization stack. The vulnerability requires the attacker to already have local access to the system. Successful exploitation results in privilege elevation from the current user context to higher privileges.

## Affected products

- Microsoft Hyper-V

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119947](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119947)

## Related threats

- [Microsoft Windows Hyper-V heap overflow privilege escalation](https://junglewise.ai/threats/cve-2026-50680-microsoft-windows-hyper-v-heap-overflow-privilege-escalation)
- [Microsoft Hyper-V buffer over-read denial of service](https://junglewise.ai/threats/cve-2026-50485-microsoft-hyper-v-buffer-over-read-denial-of-service)
- [Microsoft Hyper-V out-of-bounds read code execution](https://junglewise.ai/threats/cve-2026-47652-microsoft-hyper-v-out-of-bounds-read-code-execution)
- [Microsoft Hyper-V code execution via type confusion](https://junglewise.ai/threats/cve-2026-45641-microsoft-hyper-v-code-execution-via-type-confusion)
- [Microsoft Hyper-V out-of-bounds read code execution](https://junglewise.ai/threats/cve-2026-45607-microsoft-hyper-v-out-of-bounds-read-code-execution)