{"id":"UBUNTU-CVE-2026-3950","details":"A vulnerability was identified in strukturag libheif up to 1.21.2. This impacts the function Track::load of the file libheif/sequences/track.cc of the component stsz/stts. The manipulation leads to out-of-bounds read. The attack needs to be performed locally. The exploit is publicly available and might be used. Applying a patch is the recommended action to fix this issue. The patch available is inofficial and not approved yet.","modified":"2026-06-18T22:00:17.107630063Z","published":"2026-03-11T20:16:00Z","related":["USN-8454-1"],"upstream":["CVE-2026-3950"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-3950"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-3950"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8454-1"}],"affected":[{"package":{"name":"libheif","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libheif?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.20.2-1ubuntu0.4"}]}],"versions":["1.19.7-1","1.19.8-1","1.20.2-1","1.20.2-1ubuntu0.1","1.20.2-1ubuntu0.3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"heif-gdk-pixbuf","binary_version":"1.20.2-1ubuntu0.4"},{"binary_version":"1.20.2-1ubuntu0.4","binary_name":"heif-thumbnailer"},{"binary_version":"1.20.2-1ubuntu0.4","binary_name":"heif-view"},{"binary_version":"1.20.2-1ubuntu0.4","binary_name":"libheif-examples"},{"binary_version":"1.20.2-1ubuntu0.4","binary_name":"libheif-plugin-aomdec"},{"binary_name":"libheif-plugin-aomenc","binary_version":"1.20.2-1ubuntu0.4"},{"binary_version":"1.20.2-1ubuntu0.4","binary_name":"libheif-plugin-dav1d"},{"binary_name":"libheif-plugin-ffmpegdec","binary_version":"1.20.2-1ubuntu0.4"},{"binary_version":"1.20.2-1ubuntu0.4","binary_name":"libheif-plugin-j2kdec"},{"binary_name":"libheif-plugin-j2kenc","binary_version":"1.20.2-1ubuntu0.4"},{"binary_name":"libheif-plugin-jpegdec","binary_version":"1.20.2-1ubuntu0.4"},{"binary_name":"libheif-plugin-jpegenc","binary_version":"1.20.2-1ubuntu0.4"},{"binary_version":"1.20.2-1ubuntu0.4","binary_name":"libheif-plugin-kvazaar"},{"binary_name":"libheif-plugin-libde265","binary_version":"1.20.2-1ubuntu0.4"},{"binary_version":"1.20.2-1ubuntu0.4","binary_name":"libheif-plugin-rav1e"},{"binary_name":"libheif-plugin-svtenc","binary_version":"1.20.2-1ubuntu0.4"},{"binary_name":"libheif-plugin-x265","binary_version":"1.20.2-1ubuntu0.4"},{"binary_name":"libheif-plugins-all","binary_version":"1.20.2-1ubuntu0.4"},{"binary_name":"libheif1","binary_version":"1.20.2-1ubuntu0.4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3950.json"}},{"package":{"name":"libheif","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libheif?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.21.2-3ubuntu0.1"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"heif-gdk-pixbuf","binary_version":"1.21.2-3ubuntu0.1"},{"binary_name":"heif-thumbnailer","binary_version":"1.21.2-3ubuntu0.1"},{"binary_version":"1.21.2-3ubuntu0.1","binary_name":"heif-view"},{"binary_name":"libheif-examples","binary_version":"1.21.2-3ubuntu0.1"},{"binary_name":"libheif-plugin-aomdec","binary_version":"1.21.2-3ubuntu0.1"},{"binary_name":"libheif-plugin-aomenc","binary_version":"1.21.2-3ubuntu0.1"},{"binary_name":"libheif-plugin-dav1d","binary_version":"1.21.2-3ubuntu0.1"},{"binary_version":"1.21.2-3ubuntu0.1","binary_name":"libheif-plugin-ffmpegdec"},{"binary_version":"1.21.2-3ubuntu0.1","binary_name":"libheif-plugin-j2kdec"},{"binary_name":"libheif-plugin-j2kenc","binary_version":"1.21.2-3ubuntu0.1"},{"binary_name":"libheif-plugin-jpegdec","binary_version":"1.21.2-3ubuntu0.1"},{"binary_name":"libheif-plugin-jpegenc","binary_version":"1.21.2-3ubuntu0.1"},{"binary_name":"libheif-plugin-kvazaar","binary_version":"1.21.2-3ubuntu0.1"},{"binary_name":"libheif-plugin-libde265","binary_version":"1.21.2-3ubuntu0.1"},{"binary_version":"1.21.2-3ubuntu0.1","binary_name":"libheif-plugin-rav1e"},{"binary_version":"1.21.2-3ubuntu0.1","binary_name":"libheif-plugin-svtenc"},{"binary_version":"1.21.2-3ubuntu0.1","binary_name":"libheif-plugin-x265"},{"binary_version":"1.21.2-3ubuntu0.1","binary_name":"libheif-plugins-all"},{"binary_version":"1.21.2-3ubuntu0.1","binary_name":"libheif1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3950.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"},{"type":"Ubuntu","score":"medium"}]}