{"id":"UBUNTU-CVE-2026-32740","details":"libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and prior contain a heap-buffer-overflow (write) vulnerability in the grid tile compositing, allowing an attacker to write 64 bytes of fully attacker-controlled data past the end of a chroma plane heap allocation by crafting a HEIF/AVIF file with a 1×4 grid of odd-height tiles. The overflow is triggered during normal image decoding with default build configuration. The written bytes are chroma (Cb/Cr) pixel values from the attacking tile, giving the attacker full control over the overflow content. This issue has been fixed in version 1.22.0.","modified":"2026-06-30T18:16:14.688574101Z","published":"2026-05-19T20:16:00Z","related":["USN-8454-1"],"upstream":["CVE-2026-32740"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-32740"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-32740"},{"type":"REPORT","url":"https://github.com/strukturag/libheif/releases/tag/v1.22.0"},{"type":"REPORT","url":"https://github.com/strukturag/libheif/security/advisories/GHSA-frfr-f3vg-2g6j"},{"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":{"binaries":[{"binary_name":"heif-gdk-pixbuf","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_version":"1.20.2-1ubuntu0.4","binary_name":"libheif-examples"},{"binary_name":"libheif-plugin-aomdec","binary_version":"1.20.2-1ubuntu0.4"},{"binary_version":"1.20.2-1ubuntu0.4","binary_name":"libheif-plugin-aomenc"},{"binary_name":"libheif-plugin-dav1d","binary_version":"1.20.2-1ubuntu0.4"},{"binary_name":"libheif-plugin-ffmpegdec","binary_version":"1.20.2-1ubuntu0.4"},{"binary_name":"libheif-plugin-j2kdec","binary_version":"1.20.2-1ubuntu0.4"},{"binary_version":"1.20.2-1ubuntu0.4","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_name":"libheif-plugin-kvazaar","binary_version":"1.20.2-1ubuntu0.4"},{"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"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32740.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":{"availability":"No subscription required","binaries":[{"binary_name":"heif-gdk-pixbuf","binary_version":"1.21.2-3ubuntu0.1"},{"binary_version":"1.21.2-3ubuntu0.1","binary_name":"heif-thumbnailer"},{"binary_name":"heif-view","binary_version":"1.21.2-3ubuntu0.1"},{"binary_version":"1.21.2-3ubuntu0.1","binary_name":"libheif-examples"},{"binary_name":"libheif-plugin-aomdec","binary_version":"1.21.2-3ubuntu0.1"},{"binary_version":"1.21.2-3ubuntu0.1","binary_name":"libheif-plugin-aomenc"},{"binary_name":"libheif-plugin-dav1d","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_version":"1.21.2-3ubuntu0.1"},{"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_name":"libheif-plugin-svtenc","binary_version":"1.21.2-3ubuntu0.1"},{"binary_version":"1.21.2-3ubuntu0.1","binary_name":"libheif-plugin-x265"},{"binary_name":"libheif-plugins-all","binary_version":"1.21.2-3ubuntu0.1"},{"binary_name":"libheif1","binary_version":"1.21.2-3ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32740.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}