CVE-2026-47254 — libheif Has Heap Buffer Overflow in `Track::get_next_sample_raw_data()` -- OOB Chunk Vector Access

CVE-2026-47254

libheif Has Heap Buffer Overflow in `Track::get_next_sample_raw_data()` -- OOB Chunk Vector Access PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
strukturag / libheif	affected < 1.22.0

CWE

CWE-125

References

https://github.com/strukturag/libheif/security/advisories/GHSA-wqjg-4x9g-6cvg

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.