vmms

  1. Patch Now: Windows Hyper-V Race Condition Elevates Privileges (CVE-2025-54115)

    Microsoft’s terse advisory that “concurrent execution using a shared resource with improper synchronization (‘race condition’) in Windows Hyper‑V allows an authorized attacker to elevate privileges locally” is the single-line summary administrators need to treat as urgent: this is a Hyper‑V race...
  2. CVE-2025-48807: Patch Hyper-V Local Code Execution via VSP Channels

    Windows Hyper‑V contains a vulnerability tracked as CVE‑2025‑48807 that, according to the vendor advisory, stems from improper restriction of a Hyper‑V communication channel to its intended endpoints and can be abused by an authorized attacker to execute code locally on an affected host. This...
  3. CVE-2025-53723: Numeric Truncation in Hyper-V Elevates Privilege

    Microsoft has published an advisory for CVE-2025-53723: a numeric truncation error in Windows Hyper‑V that Microsoft classifies as an Elevation of Privilege (EoP) vulnerability; the vendor states an authorized local attacker can exploit the flaw to escalate privileges on affected hosts...
  4. R

    Hyper-V not running

    I have been using Hyper-V on a W-10 Pro 64b for four years, with two virtualized OS: a] Windows XP-SP3 b] Windows 10 Pro satisfactorily for testing, in a Lenovo laptop P70 (Xeon 2.8, 64GB RAM) with Windows 10 Pro. Just updated the OS a week ago to v:20H2 built 19042.685. Today the two virtual OS...