Project Summary
musl, pronounced like “mussel” or “muscle”, is a “libc”, an implementation of the standard library functionality described in the ISO C and POSIX standards, plus common extensions, intended for use on Linux-based systems. It is lightweight, fast, simple, free, and aims to be correct in the sense of standards-conformance and safety.
In a Nutshell, musl...
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has a well established, mature codebase
maintained by a large development team
with increasing Y-O-Y commits -
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took an estimated 27 years of effort (COCOMO model)
starting with its first commit in February, 2011
ending with its most recent commit 12 days ago
Quick Reference
GNU Lesser General Public License v2.1 or later
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These details are provided for information only. No information here is legal advice and should not be used as such.
MIT License
Permitted
Commercial Use
Modify
Distribute
Sub-License
Private Use
Forbidden
Hold Liable
Required
Include Copyright
Include License
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
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30 Day SummarySep 16 2026 — Oct 16 2026
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12 Month SummaryOct 16 2025 — Oct 16 2026
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