{"id":"UBUNTU-CVE-2026-62292","details":"libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.1, a crafted uncompressed HEIF image using generic zlib unci full-item compression can crash an application that decodes an advertised tile with heif_image_handle_decode_image_tile(). In libheif/codecs/uncompressed/unc_decoder.cc, unc_decoder::fetch_tile_data() computes a large tile offset and unc_decoder::get_compressed_image_data_uncompressed() validates it with range_start_offset plus range_size. For the last advertised tile (4095, 4095), the addition can wrap to zero, bypass the bounds check, and pass an invalid source pointer and a one-terabyte length to memcpy. The observed result is an out-of-bounds read and process crash; opening the file alone does not trigger the issue because tile decoding is required. This issue is fixed in version 1.23.1.","modified":"2026-09-02T19:36:20.533746916Z","published":"2026-08-13T00:00:00Z","related":["USN-8649-1"],"upstream":["CVE-2026-62292"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-62292"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-62292"},{"type":"REPORT","url":"https://github.com/strukturag/libheif/security/advisories/GHSA-73p7-m7gg-w2jv"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8649-1"}],"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":"1.21.2-3ubuntu0.4"}]}],"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","1.21.2-3ubuntu0.3"],"ecosystem_specific":{"binaries":[{"binary_name":"heif-gdk-pixbuf","binary_version":"1.21.2-3ubuntu0.4"},{"binary_version":"1.21.2-3ubuntu0.4","binary_name":"heif-thumbnailer"},{"binary_version":"1.21.2-3ubuntu0.4","binary_name":"heif-view"},{"binary_version":"1.21.2-3ubuntu0.4","binary_name":"libheif-examples"},{"binary_version":"1.21.2-3ubuntu0.4","binary_name":"libheif-plugin-aomdec"},{"binary_name":"libheif-plugin-aomenc","binary_version":"1.21.2-3ubuntu0.4"},{"binary_version":"1.21.2-3ubuntu0.4","binary_name":"libheif-plugin-dav1d"},{"binary_name":"libheif-plugin-ffmpegdec","binary_version":"1.21.2-3ubuntu0.4"},{"binary_name":"libheif-plugin-j2kdec","binary_version":"1.21.2-3ubuntu0.4"},{"binary_version":"1.21.2-3ubuntu0.4","binary_name":"libheif-plugin-j2kenc"},{"binary_version":"1.21.2-3ubuntu0.4","binary_name":"libheif-plugin-jpegdec"},{"binary_name":"libheif-plugin-jpegenc","binary_version":"1.21.2-3ubuntu0.4"},{"binary_name":"libheif-plugin-kvazaar","binary_version":"1.21.2-3ubuntu0.4"},{"binary_name":"libheif-plugin-libde265","binary_version":"1.21.2-3ubuntu0.4"},{"binary_version":"1.21.2-3ubuntu0.4","binary_name":"libheif-plugin-rav1e"},{"binary_version":"1.21.2-3ubuntu0.4","binary_name":"libheif-plugin-svtenc"},{"binary_name":"libheif-plugin-x265","binary_version":"1.21.2-3ubuntu0.4"},{"binary_name":"libheif-plugins-all","binary_version":"1.21.2-3ubuntu0.4"},{"binary_name":"libheif1","binary_version":"1.21.2-3ubuntu0.4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-62292.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}