libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, Track::init_sample_timing_table() in libheif/sequences/track.cc stores an out-of-bounds chunk index (m_chunks.size()) into m_presentation_timeline when the number of chunks defined in the stco box is less than the number of samples in stsz. A subsequent call to heif_track_get_next_raw_sequence_sample() reads m_chunks[chunk_idx] with that OOB index, causing a heap-buffer-overflow. Version 1.22.0 fixes the issue.
Exploitability
AV:LAC:LPR:NUI:RScope
S:UImpact
C:LI:NA:H6.1/CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:HMemory Safety