matio (aka MAT File I/O Library) 1.5.18 through 1.5.21 has a heap-based buffer overflow in ReadInt32DataDouble (called from ReadInt32Data and Mat_VarRead4). (CVE-2020-36428)
matio (aka MAT File I/O Library) 1.5.20 and 1.5.21 has a heap-based buffer overflow in H5MMmemcpy (called from H5MMmalloc and H5Cloadentry), related to use of HDF5 1.12.0. (CVE-2021-36977)