[Zlib-announce] zlib 1.2.12 released

Adler, Mark madler at alumni.caltech.edu
Sun Mar 27 21:40:14 MST 2022

Patient zlib followers,

zlib 1.2.12 has been released. You can find it here:


and here:


zlib 1.2.11 had a bug that could cause an out-of-bound access for some input when deflating with Z_FIXED. This version was pushed to address concerns with that bug, but has many other improvements (see the ChangeLog).


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