Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Struktur | Libheif | < 1.22.0 |
Related Weaknesses (CWE)
References
- https://github.com/strukturag/libheif/security/advisories/GHSA-wqjg-4x9g-6cvgExploitMitigationVendor Advisory
FAQ
What is CVE-2026-47254?
CVE-2026-47254 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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....
How severe is CVE-2026-47254?
CVE-2026-47254 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-47254?
Check the references section above for vendor advisories and patch information. Affected products include: Struktur Libheif.