libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, crafted HEIF sequence timing and edit-list data can make Track::init_sample_timing_table() compute a logical m_num_output_samples value that exceeds the uint32_t counters used by Track_Visual::decode_next_image_sample() and Track::get_next_sample_raw_data(). The resulting comparison can never reach the oversized output count, causing non-terminating decode or raw-sample loops and bypassing max_sequence_frames. The same sequence path repeatedly calls Box_stts::get_sample_duration() and allocates Chunk::m_sample_ranges and Track::m_presentation_timeline outside MemoryHandle accounting, allowing severe CPU and memory exhaustion from a small file. This issue is fixed in version 1.23.2.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade libheif | Sep 30, 2026 | Sep 18, 2026 |
| Ubuntu | — | Upgrade libheif1Upgrade libheif-plugin-j2kdecUpgrade libheif1 (Ubuntu Pro)Upgrade libheif-plugin-rav1eUpgrade libheif-plugin-libde265Upgrade libheif-plugin-ffmpegdecUpgrade libheif-devUpgrade libheif-plugin-j2kencUpgrade heif-viewUpgrade heif-thumbnailerUpgrade heif-gdk-pixbuf (Ubuntu Pro)Upgrade libheif-plugin-aomdecUpgrade libheif-dev (Ubuntu Pro)Upgrade libheif-plugin-aomencUpgrade libheif-plugin-jpegdecUpgrade heif-thumbnailer (Ubuntu Pro)Upgrade libheif-plugin-jpegencUpgrade libheif-plugin-dav1dUpgrade libheif-plugins-allUpgrade libheif-plugin-x265Upgrade libheif-plugin-kvazaarUpgrade heif-gdk-pixbufUpgrade libheif-plugin-svtenc | Oct 6, 2026 | Sep 29, 2026 |
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