PT-2026-49253

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 792-byte HEIF sequence file with samples per chunk=0 in the stsc box causes an unsigned integer underflow in the Chunk constructor m last sample = 0 + 0 - 1 = UINT32 MAX, mapping all samples to an...