CVE-2026-84448 libheif: Heap out-of-bounds read in libheif inline-mask region API (heif_region_item_add_region_inline_mask_data / heif_region_get_mask_image)

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, the public heifregionitemaddregioninlinemaskdata function in libheif/api/libheif/heifregions.cc accepts maskdatalen without verifying that it equals the byte count required by width and height. A later...

CVE-2026-84448

libheif , a HEIF and AVIF file format decoder/encoder, contains a heap out-of-bounds read in its region writer API prior to version 1.23.2 . The function heif_region_item_add_region_inline_mask_data() in heif_regions.cc accepts a mask_data_len parameter without verifying it matches the byte count...