Core:
    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 #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).
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)
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).
PCRE:
    Fixed bug #79188 (Memory corruption in preg_replace/preg_replace_callback and unicode).
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 #79329 (get_headers() silently truncates after a null byte). (CVE-2020-7066)
    Fixed bug #79254 (getenv() w/o arguments not showing changes).
    Fixed bug #79265 (Improper injection of Host header when using fopen for http requests).