VDB
CVE-2026-47254
CVE-2026-47254
PUBLISHED
CVSS 6.1 MEDIUM
Reported by GitHub_M · Published July 21, 2026
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.
Risk Scores
CVSS 3.1
6.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| strukturag | libheif | < 1.22.0 |
| strukturag | libheif | < 1.22.0, < 1.22.0 |
Timeline
- May 28, 2026 CVE Published
- Jul 22, 2026 Coalition ESS Score
- Jul 22, 2026 CVE Updated
- Aug 7, 2026 EPSS Score
- Aug 24, 2026 EPSS Score
- Sep 9, 2026 EPSS Score
- Sep 16, 2026 EPSS Score
- Sep 20, 2026 Security Advisory
References
- https://github.com/strukturag/libheif/security/advisories/GHSA-wqjg-4x9g-6cvg x_refsource_CONFIRM