musl libc
musl libc
musl
is an implementation of the C standard library built on top
of the Linux system call API, including interfaces defined in the base
language standard, POSIX, and widely agreed-upon extensions.
musl
is
lightweight
fast
simple
free
, and strives to be
correct
in the sense of standards-conformance and safety.
New to musl libc? Read more
about musl
or visit the
community wiki
SECURITY ADVISORY: All releases through 1.2.6 are affected by
CVE-2026-40200
on
32-bit archs, and should be
patched
SECURITY ADVISORY: All releases through 1.2.6 are affected by
CVE-2026-6042
Users who may have
iconv
exposed to untrusted data should
patch
to avoid a
denial of service.
SECURITY ADVISORY: All releases through 1.2.5 are affected by
CVE-2025-26519
and
should be patched
) or
upgraded.
SECURITY ADVISORY: All releases through 1.2.1 are affected by
CVE-2020-28928
and
should be
patched
or
upgraded to a later version.
Users of 32-bit systems upgrading from 1.1.x to the 1.2 series
should read the
time64 release notes
regarding 64-bit
time_t
and how it affects compatibility with an existing
environment.
Source Code
Official git repository
Latest release:
musl-1.2.6.tar.gz
sig
Release history
Automated cross toolchain builder:
musl-cross-make
Documentation
Official manual
(WIP)
Community wiki
Support
Public support for musl is available via the
mailing
list
and
#musl
on the
Libera.Chat IRC
network
. Subscription details and further
private/commercial support options can be found on musl's
support
page
Sponsors
Development and maintenance of musl is funded by many generous
sponsors pledging through
Patreon
and
GitHub Sponsors
. One-time
donations can also be accepted via
Paypal
Special thanks goes out to individual project sponsors, who have
pledged at the $150/month level or higher:
Andrew Kelley
Jeremiah Gowdy
Julien Voisin
and to
Openwall
for infrastructure
donations for the project mailing list.
Work on musl has also been sponsored by:
The Zig Programming Language
Core Semiconductor
Pantacor
Other anonymous sponsors
Want to support musl and have your company/organization credited as a
sponsor? Contact
sponsorship AT musl-libc DOT org
US