Lots of fixes exposed by fuzzers like AFL, ClusterFuzz, OSSFuzz and others:
CVE-2016-6328: fixed integer overflow when parsing maker notes
CVE-2017-7544: fixed buffer overread
CVE-2018-20030: Fix for recursion DoS
CVE-2019-9278: replaced integer overflow checks the compiler could optimize away by safer constructs
CVE-2020-0093: read overflow
CVE-2020-12767: fixed division by zero
CVE-2020-13112: Various buffer overread fixes due to integer overflows in maker notes
CVE-2020-13113: Potential use of uninitialized memory
CVE-2020-13114: Time consumption DoS when parsing canon array markers