LibreDWG 0.12.4.4313 through 0.12.4.4367 has an out-of-bounds write in dwg_free_BLOCK_private (called from dwg_free_BLOCK and dwg_free_object).Referenceshttps://github.com/google/oss-fuzz-vulns/blob/main/vulns/libredwg/OSV-2021-814.yamlhttps://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34766