---
id: "CVE-2026-95989"
page: "https://infrastack.ai/live/CVE-2026-95989"
kind: "vulnerability"
aliases: ["CVE-2026-95989"]
title: "Windows vhdmp.sys: use-after-free lets a local user gain higher privileges"
severity: "high"
cvss: 7.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "local-users", "windows"]
not_affected_if: ["no-local-untrusted-users"]
published_at: "2026-11-10T19:21:55+00:00"
first_seen_at: "2026-11-10T19:25:26+00:00"
updated_at: "2026-11-10T20:14:32+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-95989", "first_seen_at": "2026-11-10T19:25:26+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-11-10T20:14:32+00:00"}]
exploit_sources: []
---

# Windows vhdmp.sys: use-after-free lets a local user gain higher privileges

Link for people: https://infrastack.ai/live/CVE-2026-95989 (this .md is for agents)

A use-after-free bug in the Windows virtual hard disk driver (vhdmp.sys) lets an authorized local user elevate privileges. An attacker who already has a local account can gain higher system rights.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

Unknown until the MSRC entry for CVE-2026-95989 lists affected builds and KBs. Meanwhile: check the installed Windows build (winver) against the November 2026 cumulative update for your Windows version in the Microsoft Security Update Guide, and see whether untrusted local users or Hyper-V/VHD mounting are in play.

## Timeline

- 2026-11-10T19:25:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-95989
- 2026-11-10T20:14:32+00:00 analyst — Could not read the MSRC advisory (JS-only page, web-cli/WebFetch returned nothing; NVD page empty too). No builds, KB or fix confirmed; nothing verified. Search/X not tried beyond this. Revisit when MSRC text is available.

## From the sources

Use after free in vhdmp.sys allows an authorized attacker to elevate privileges locally.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_