Project Summary
QEMU is a generic and open source machine emulator and virtualizer.
When used as a machine emulator, QEMU can run OSes and programs made for one machine on a different machine. By using dynamic translation, it achieves very good performance.
When used as a virtualizer, QEMU achieves near native performances by executing the guest code directly on the host CPU.
In a Nutshell, QEMU...
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has a well established, mature codebase
maintained by a very large development team
with stable Y-O-Y commits -
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took an estimated 565 years of effort (COCOMO model)
starting with its first commit in February, 2003
ending with its most recent commit 4 days ago
BSD 4-clause (University of California-Specific)
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GNU General Public License v2.0 or later
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MIT
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These details are provided for information only. No information here is legal advice and should not be used as such.
Public Domain / GPL When Compiled
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These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
Did You Know...
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30 Day SummaryJun 14 2026 — Jul 14 2026
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12 Month SummaryJul 14 2025 — Jul 14 2026
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