{"id":"UBUNTU-CVE-2026-47254","details":"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.","modified":"2026-07-29T10:19:05.646260558Z","published":"2026-07-02T00:00:00Z","related":["USN-8526-1"],"upstream":["CVE-2026-47254"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-47254"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-47254"},{"type":"REPORT","url":"https://github.com/strukturag/libheif/security/advisories/GHSA-wqjg-4x9g-6cvg"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8526-1"}],"affected":[{"package":{"name":"libheif","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libheif?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.21.2-3ubuntu0.3"}]}],"versions":["1.20.2-1","1.20.2-2","1.20.2-2build1","1.20.2-2build2","1.20.2-2ubuntu1","1.21.2-1","1.21.2-3","1.21.2-3ubuntu0.1","1.21.2-3ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.21.2-3ubuntu0.3","binary_name":"heif-gdk-pixbuf"},{"binary_name":"heif-thumbnailer","binary_version":"1.21.2-3ubuntu0.3"},{"binary_name":"heif-view","binary_version":"1.21.2-3ubuntu0.3"},{"binary_version":"1.21.2-3ubuntu0.3","binary_name":"libheif-examples"},{"binary_version":"1.21.2-3ubuntu0.3","binary_name":"libheif-plugin-aomdec"},{"binary_name":"libheif-plugin-aomenc","binary_version":"1.21.2-3ubuntu0.3"},{"binary_version":"1.21.2-3ubuntu0.3","binary_name":"libheif-plugin-dav1d"},{"binary_version":"1.21.2-3ubuntu0.3","binary_name":"libheif-plugin-ffmpegdec"},{"binary_name":"libheif-plugin-j2kdec","binary_version":"1.21.2-3ubuntu0.3"},{"binary_name":"libheif-plugin-j2kenc","binary_version":"1.21.2-3ubuntu0.3"},{"binary_version":"1.21.2-3ubuntu0.3","binary_name":"libheif-plugin-jpegdec"},{"binary_name":"libheif-plugin-jpegenc","binary_version":"1.21.2-3ubuntu0.3"},{"binary_name":"libheif-plugin-kvazaar","binary_version":"1.21.2-3ubuntu0.3"},{"binary_name":"libheif-plugin-libde265","binary_version":"1.21.2-3ubuntu0.3"},{"binary_name":"libheif-plugin-rav1e","binary_version":"1.21.2-3ubuntu0.3"},{"binary_version":"1.21.2-3ubuntu0.3","binary_name":"libheif-plugin-svtenc"},{"binary_version":"1.21.2-3ubuntu0.3","binary_name":"libheif-plugin-x265"},{"binary_name":"libheif-plugins-all","binary_version":"1.21.2-3ubuntu0.3"},{"binary_name":"libheif1","binary_version":"1.21.2-3ubuntu0.3"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47254.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}