Core:
    Fixed bug #79329 (get_headers() silently truncates after a null byte) (CVE-2020-7066)
    Fixed bug #79244 (php crashes during parsing INI file).
    Fixed bug #63206 (restore_error_handler does not restore previous errors mask).
COM:
    Fixed bug #66322 (COMPersistHelper::SaveToFile can save to wrong location).
    Fixed bug #79242 (COM error constants don't match com_exception codes on x86).
    Fixed bug #79247 (Garbage collecting variant objects segfaults).
    Fixed bug #79248 (Traversing empty VT_ARRAY throws com_exception).
    Fixed bug #79299 (com_print_typeinfo prints duplicate variables).
    Fixed bug #79332 (php_istreams are never freed).
    Fixed bug #79333 (com_print_typeinfo() leaks memory).
CURL:
    Fixed bug #79019 (Copied cURL handles upload empty file).
    Fixed bug #79013 (Content-Length missing when posting a curlFile with curl).
DOM:
    Fixed bug #77569: (Write Access Violation in DomImplementation).
    Fixed bug #79271 (DOMDocumentType::$childNodes is NULL).
Enchant:
    Fixed bug #79311 (enchant_dict_suggest() fails on big endian architecture).
EXIF:
    Fixed bug #79282 (Use-of-uninitialized-value in exif) (CVE-2020-7064).
Fileinfo:
    Fixed bug #79283 (Segfault in libmagic patch contains a buffer overflow).
FPM:
    Fixed bug #77653 (operator displayed instead of the real error message).
    Fixed bug #79014 (PHP-FPM & Primary script unknown).
MBstring:
    Fixed bug #79371 (mb_strtolower (UTF-32LE): stack-buffer-overflow at php_unicode_tolower_full) (CVE-2020-7065).
MySQLi:
    Fixed bug #64032 (mysqli reports different client_version).
MySQLnd:
    Implemented FR #79275 (Support auth_plugin_caching_sha2_password on Windows).
Opcache:
    Fixed bug #79252 (preloading causes php-fpm to segfault during exit).
PCRE:
    Fixed bug #79188 (Memory corruption in preg_replace/preg_replace_callback and unicode).
    Fixed bug #79241 (Segmentation fault on preg_match()).
    Fixed bug #79257 (Duplicate named groups (?J) prefer last alternative even if not matched).
PDO_ODBC:
    Fixed bug #79038 (PDOStatement::nextRowset() leaks column values).
Reflection:
    Fixed bug #79062 (Property with heredoc default value returns false for getDocComment).
SQLite3:
    Fixed bug #79294 (::columnType() may fail after SQLite3Stmt::reset()).
Standard:
    Fixed bug #79254 (getenv() w/o arguments not showing changes).
    Fixed bug #79265 (Improper injection of Host header when using fopen for http requests).
Zip:
    Fixed bug #79315 (ZipArchive::addFile doesn't honor start/length parameters).