Bcmath:
    Fixed bug #78878 (Buffer underflow in bc_shift_addsub). (CVE-2019-11046).
Core:
    Fixed bug #78862 (link() silently truncates after a null byte on Windows). (CVE-2019-11044).
    Fixed bug #78863 (DirectoryIterator class silently truncates after a null byte). (CVE-2019-11045).
    Fixed bug #78943 (mail() may release string with refcount==1 twice). (CVE-2019-11049).
    Fixed bug #78810 (RW fetches do not throw "uninitialized property" exception).
    Fixed bug #78868 (Calling __autoload() with incorrect EG(fake_scope) value).
    Fixed bug #78296 (is_file fails to detect file).
    Fixed bug #78883 (fgets(STDIN) fails on Windows).
    Fixed bug #78898 (call_user_func(['parent', ...]) fails while other succeed).
    Fixed bug #78904 (Uninitialized property triggers __get()).
    Fixed bug #78926 (Segmentation fault on Symfony cache:clear).
GD:
    Fixed bug #78849 (GD build broken with -D SIGNED_COMPARE_SLOW).
    Fixed bug #78923 (Artifacts when convoluting image with transparency).
EXIF:
    Fixed bug #78793 (Use-after-free in exif parsing under memory sanitizer). (CVE-2019-11050).
    Fixed bug #78910 (Heap-buffer-overflow READ in exif). (CVE-2019-11047).
FPM:
    Fixed bug #76601 (Partially working php-fpm ater incomplete reload).
    Fixed bug #78889 (php-fpm service fails to start).
    Fixed bug #78916 (php-fpm 7.4.0 don't send mail via mail()).
Intl:
    Implemented FR #78912 (INTL Support for accounting format).
Mysqlnd:
    Fixed bug #78823 (ZLIB_LIBS not added to EXTRA_LIBS).
OPcache:
    Fixed $x = (bool)$x; with opcache (should emit undeclared variable notice).
    Fixed bug #78935 (Preloading removes classes that have dependencies).
PCRE:
    Fixed bug #78853 (preg_match() may return integer > 1).
Reflection:
    Fixed bug #78895 (Reflection detects abstract non-static class as abstract static. IS_IMPLICIT_ABSTRACT is not longer used).
Standard:
    Fixed bug #77638 (var_export'ing certain class instances segfaults).
    Fixed bug #78840 (imploding $GLOBALS crashes).
    Fixed bug #78833 (Integer overflow in pack causes out-of-bound access).
    Fixed bug #78814 (strip_tags allows / in tag name => whitelist bypass).