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libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted HEIF sequence accepted by heif_context_read_from_memory() can leave the context with no registered sequence tracks and crash when heif_context_get_track(ctx, 0) is called. HeifContext::get_track() in libheif/context.cc executes assert(has_sequence()) before its normal error handling, so assert-enabled builds abort instead of allowing the public wrapper in libheif/api/libheif/heif_sequences.cc to return null. In release builds, removing the assertion lets the track_id zero path dereference m_tracks.begin()->second on an empty map, which is undefined behavior and typically crashes. The issue is reachable through documented public APIs after parsing attacker-controlled bytes. This issue is fixed in version 1.23.1.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Ubuntu | — | Upgrade libheif-plugins-allUpgrade libheif-plugin-x265Upgrade libheif-plugin-jpegencUpgrade libheif-plugin-aomencUpgrade libheif-plugin-ffmpegdecUpgrade libheif-plugin-libde265Upgrade libheif-plugin-dav1dUpgrade heif-thumbnailerUpgrade libheif-plugin-kvazaarUpgrade libheif-plugin-svtencUpgrade libheif-plugin-j2kdecUpgrade libheif-plugin-jpegdecUpgrade libheif-devUpgrade heif-gdk-pixbufUpgrade heif-viewUpgrade libheif-plugin-rav1eUpgrade libheif-plugin-j2kencUpgrade libheif-plugin-aomdecUpgrade libheif1 | Sep 17, 2026 | Sep 16, 2026 |
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