{"id":"UBUNTU-CVE-2026-3949","details":"A vulnerability was determined in strukturag libheif up to 1.21.2. This affects the function vvdec_push_data2 of the file libheif/plugins/decoder_vvdec.cc of the component HEIF File Parser. Executing a manipulation of the argument size can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called b97c8b5f198b27f375127cd597a35f2113544d03. It is advisable to implement a patch to correct this issue.","modified":"2026-04-02T20:52:45.162140Z","published":"2026-03-11T19:16:00Z","withdrawn":"2026-04-02T17:29:38Z","upstream":["CVE-2026-3949"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-3949"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-3949"}],"affected":[{"package":{"name":"libheif","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libheif@1.1.0-2ubuntu0.1~esm2?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0-2","1.1.0-2ubuntu0.1~esm1","1.1.0-2ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.0-2ubuntu0.1~esm2","binary_name":"libheif-dev"},{"binary_version":"1.1.0-2ubuntu0.1~esm2","binary_name":"libheif-examples"},{"binary_version":"1.1.0-2ubuntu0.1~esm2","binary_name":"libheif1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3949.json"}},{"package":{"name":"libheif","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/libheif@1.6.1-1ubuntu0.1~esm2?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.0-1build1","1.5.1-1","1.5.1-1build1","1.6.0-1","1.6.1-1","1.6.1-1build1","1.6.1-1ubuntu0.1~esm1","1.6.1-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.6.1-1ubuntu0.1~esm2","binary_name":"heif-gdk-pixbuf"},{"binary_version":"1.6.1-1ubuntu0.1~esm2","binary_name":"heif-thumbnailer"},{"binary_version":"1.6.1-1ubuntu0.1~esm2","binary_name":"libheif-dev"},{"binary_version":"1.6.1-1ubuntu0.1~esm2","binary_name":"libheif-examples"},{"binary_version":"1.6.1-1ubuntu0.1~esm2","binary_name":"libheif1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3949.json"}},{"package":{"name":"libheif","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/libheif@1.12.0-2ubuntu0.1~esm2?arch=source&distro=esm-apps/jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.11.0-1","1.12.0-2build1","1.12.0-2ubuntu0.1~esm1","1.12.0-2ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.12.0-2ubuntu0.1~esm2","binary_name":"heif-gdk-pixbuf"},{"binary_version":"1.12.0-2ubuntu0.1~esm2","binary_name":"heif-thumbnailer"},{"binary_version":"1.12.0-2ubuntu0.1~esm2","binary_name":"libheif-dev"},{"binary_version":"1.12.0-2ubuntu0.1~esm2","binary_name":"libheif-examples"},{"binary_version":"1.12.0-2ubuntu0.1~esm2","binary_name":"libheif1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3949.json"}},{"package":{"name":"libheif","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libheif@1.17.6-1ubuntu4.2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.16.2-2ubuntu1","1.17.1-1ubuntu2","1.17.1-1ubuntu3","1.17.4-1ubuntu1","1.17.6-1ubuntu1","1.17.6-1ubuntu2","1.17.6-1ubuntu3","1.17.6-1ubuntu4","1.17.6-1ubuntu4.1","1.17.6-1ubuntu4.2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"heif-gdk-pixbuf"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"heif-thumbnailer"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-dev"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-examples"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-plugin-aomdec"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-plugin-aomenc"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-plugin-dav1d"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-plugin-ffmpegdec"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-plugin-j2kdec"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-plugin-j2kenc"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-plugin-jpegdec"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-plugin-jpegenc"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-plugin-libde265"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-plugin-rav1e"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-plugin-svtenc"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif-plugin-x265"},{"binary_version":"1.17.6-1ubuntu4.2","binary_name":"libheif1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3949.json"}},{"package":{"name":"libheif","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libheif@1.20.2-1ubuntu0.1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.19.7-1","1.19.8-1","1.20.2-1","1.20.2-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"heif-gdk-pixbuf"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"heif-thumbnailer"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"heif-view"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-dev"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-examples"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-aomdec"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-aomenc"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-dav1d"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-ffmpegdec"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-j2kdec"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-j2kenc"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-jpegdec"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-jpegenc"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-kvazaar"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-libde265"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-rav1e"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-svtenc"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugin-x265"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif-plugins-all"},{"binary_version":"1.20.2-1ubuntu0.1","binary_name":"libheif1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3949.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"}]}