| Version | Change log |
| Cygwin 3.6.7 Mar 3, 2026 |
Fixes: Guard c32rtomb() against invalid input characters. Addresses a testsuite error in current gawk git master. Allow changing primary group even when running with cygserver account caching. Addresses: https://cygwin.com/pipermail/cygwin/2026-January/259250.html Correctly handle i->İ, I->ı conversion in turk and azerbaijani languages (LC_CTYPE=tr_TR, tr_CY, az_AZ). Fix uid/gid mapping from unix id to Cygwin id in certain scenarios when accessing Samba or NFS shares on unixoid OS. gencat: Fix a bug in octal value handling in catalog input files. Addresses a flaw in tcsh's cataloge file generation. Bump default_POSIX_C_SOURCE to 202405. |
| Cygwin 3.6.6 Feb 2, 2026 |
Fixes: Fix the problem that the destructor of dlopen()'ed DLL may be called after dlclose(). This fixes the crash on exiting SDL2. Fix the problem that the constructor of dlopen()'ed DLL may be called twice. Fix deadlock regarding atexit()'ed function, that waits for another thread which calls atexit(). Fix the problem that tmp_pathbuf area is destroyed regarding flock(). Improve newgrp(1) POSIX compatibility and its documentation. Fix ESC sequence parsing in pty_master_fwd_thread. Add a new workaround which prevent the screen from being garbled when cmd.exe is started using rlwrap in Win11. Fix a bug where app execution aliases no longer start correctly. Fix primary group override for non-domain users and users of a Microsoft account. Fix the deadlock between the parent and child processes, where both lock the same file and attempt to close it simultaneously. |
| Cygwin 3.6.5 Nov 6, 2025 |
Fixes: Fix two minor bugs in clock and POSIX timer handling. Fix an ordering problem in sys/termios.h. Fix doxygen hang due to a deadlock between fclose() and fork(). Fix multi-thread safety of system(). Revert fix handling of invalid 4 byte UTF-8 sequence. It was broken. Instead, fix internal conversion of filenames in case of an invalid 4 byte UTF-8 sequence. Make process_fd correctly handle pty and console. Fix Ctrl-O (FLUSHO) handling. Fix multi-thread safety of fork()/exec() by adding the same locking as was done for spawn. Fix native symlink to '.' (a regression in 3.6.4) |
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