RCE in Windows Hyper-V via Out-of-Bounds Read
CVE-2026-47652 is a critical remote code execution vulnerability in Windows Hyper-V. The provided content consistently describes the flaw as an out-of-bounds read in Hyper-V, with one advisory also characterizing the condition as a heap-based buffer overflow/out-of-bounds read reachable through a crafted hypercall. In the supplied reporting, exploitation occurs in a virtualized environment where an attacker operating from a guest VM can send specially crafted requests to Hyper-V-exposed hardware resources or a crafted hypercall, triggering the memory-safety flaw in the Hyper-V host context and enabling code execution.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical remote code execution vulnerability in Windows Hyper-V that can enable guest-to-host escape.
A critical remote code execution vulnerability in Windows Hyper-V caused by out-of-bounds read conditions that may allow guest-to-host compromise.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.