aom_image.c in libaom in AOMedia before 2021-04-07 frees memory that is not located on the heap (CVE-2021-30473).
aomdsp/graintable.c in libaom in AOMedia before 2021-03-30 has a use-after-free (CVE-2021-30474).
aomdsp/noisemodel.c in libaom in AOMedia before 2021-03-24 has a buffer overflow (CVE-2021-30475).