libheif: libheif is a HEIF and AVIF file format decoder and encoder
CVE-2026-84446 is fixed in 20 products on 1 platform, first by heif-gdk-pixbuf 1.21.2-3ubuntu0.6, released September 18, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| heif-gdk-pixbuf · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | heif-gdk-pixbuf 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| heif-thumbnailer · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | heif-thumbnailer 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| heif-view · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | heif-view 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif · Debian 13.5 (trixie) | 1.23.4-1~deb13u1 | DEBIAN-CVE-2026-84446 | Sep 19, 2026 |
| libheif · Debian 14 | 1.23.2-1 | DEBIAN-CVE-2026-84446 | Sep 19, 2026 |
| libheif · opensuse-leap 16.0 | 1.23.4-160000.1.1 | OPENSUSE-SU-2026:21889-1 | Sep 20, 2026 |
| libheif · sles 15.7 | 1.23.4-150700.3.21.1 | SUSE-SU-2026:4276-1 | Sep 21, 2026 |
| libheif-examples · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-examples 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-aomdec · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-aomdec 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-aomenc · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-aomenc 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-dav1d · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-dav1d 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-ffmpegdec · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-ffmpegdec 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-j2kdec · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-j2kdec 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-j2kenc · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-j2kenc 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-jpegdec · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-jpegdec 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-jpegenc · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-jpegenc 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-kvazaar · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-kvazaar 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-libde265 · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-libde265 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-rav1e · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-rav1e 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-svtenc · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-svtenc 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugin-x265 · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugin-x265 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif-plugins-all · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif-plugins-all 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
| libheif1 · Ubuntu 26.04.1 LTS (resolute) | 1.21.2-3ubuntu0.6 | libheif1 1.21.2-3ubuntu0.6 | Sep 18, 2026 |
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