{"id":"UBUNTU-CVE-2026-125209","details":"FFmpeg before 8.1.3 and 9.x before 9.0.2 contains a heap buffer overflow vulnerability in the DVD subtitle encoder that underestimates RLE output size for odd-width rectangles. Attackers can supply files with crafted bitmap subtitles that, when transcoded to the dvdsub encoder, write past the output buffer and corrupt heap memory.","modified":"2026-11-11T09:39:22.527211801Z","published":"2026-11-10T00:00:00Z","upstream":["CVE-2026-125209"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-125209"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-125209"},{"type":"REPORT","url":"code.ffmpeg.org/ffmpeg/ffmpeg"}],"affected":[{"package":{"name":"ffmpeg","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7:2.7.2-1build1","7:2.8.1-1ubuntu1","7:2.8.2-1ubuntu1","7:2.8.3-1","7:2.8.4-1","7:2.8.4-1ubuntu1","7:2.8.4-1ubuntu2","7:2.8.4-1ubuntu3","7:2.8.4-1ubuntu4","7:2.8.6-1ubuntu1","7:2.8.6-1ubuntu2","7:2.8.8-0ubuntu0.16.04.1","7:2.8.10-0ubuntu0.16.04.1","7:2.8.11-0ubuntu0.16.04.1","7:2.8.14-0ubuntu0.16.04.1","7:2.8.15-0ubuntu0.16.04.1","7:2.8.15-0ubuntu0.16.04.1+esm1","7:2.8.17-0ubuntu0.1","7:2.8.17-0ubuntu0.1+esm1","7:2.8.17-0ubuntu0.1+esm2","7:2.8.17-0ubuntu0.1+esm3","7:2.8.17-0ubuntu0.1+esm4","7:2.8.17-0ubuntu0.1+esm5","7:2.8.17-0ubuntu0.1+esm6","7:2.8.17-0ubuntu0.1+esm7","7:2.8.17-0ubuntu0.1+esm8","7:2.8.17-0ubuntu0.1+esm9","7:2.8.17-0ubuntu0.1+esm10","7:2.8.17-0ubuntu0.1+esm11","7:2.8.17-0ubuntu0.1+esm12","7:2.8.17-0ubuntu0.1+esm13","7:2.8.17-0ubuntu0.1+esm14","7:2.8.17-0ubuntu0.1+esm15","7:2.8.17-0ubuntu0.1+esm16","7:2.8.17-0ubuntu0.1+esm17","7:2.8.17-0ubuntu0.1+esm18"],"ecosystem_specific":{"binaries":[{"binary_name":"ffmpeg","binary_version":"7:2.8.17-0ubuntu0.1+esm18"},{"binary_version":"7:2.8.17-0ubuntu0.1+esm18","binary_name":"libav-tools"},{"binary_name":"libavcodec-extra","binary_version":"7:2.8.17-0ubuntu0.1+esm18"},{"binary_version":"7:2.8.17-0ubuntu0.1+esm18","binary_name":"libavcodec-ffmpeg-extra56"},{"binary_name":"libavcodec-ffmpeg56","binary_version":"7:2.8.17-0ubuntu0.1+esm18"},{"binary_name":"libavdevice-ffmpeg56","binary_version":"7:2.8.17-0ubuntu0.1+esm18"},{"binary_version":"7:2.8.17-0ubuntu0.1+esm18","binary_name":"libavfilter-ffmpeg5"},{"binary_name":"libavformat-ffmpeg56","binary_version":"7:2.8.17-0ubuntu0.1+esm18"},{"binary_name":"libavresample-ffmpeg2","binary_version":"7:2.8.17-0ubuntu0.1+esm18"},{"binary_name":"libavutil-ffmpeg54","binary_version":"7:2.8.17-0ubuntu0.1+esm18"},{"binary_version":"7:2.8.17-0ubuntu0.1+esm18","binary_name":"libpostproc-ffmpeg53"},{"binary_name":"libswresample-ffmpeg1","binary_version":"7:2.8.17-0ubuntu0.1+esm18"},{"binary_version":"7:2.8.17-0ubuntu0.1+esm18","binary_name":"libswscale-ffmpeg3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-125209.json"}},{"package":{"name":"ffmpeg","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7:3.3.4-2","7:3.3.4-2build3","7:3.4-2ubuntu2","7:3.4-4","7:3.4-4build1","7:3.4.1-1","7:3.4.1-1build1","7:3.4.2-1","7:3.4.2-1build1","7:3.4.2-2","7:3.4.4-0ubuntu0.18.04.1","7:3.4.6-0ubuntu0.18.04.1","7:3.4.8-0ubuntu0.2","7:3.4.11-0ubuntu0.1","7:3.4.11-0ubuntu0.1+esm1","7:3.4.11-0ubuntu0.1+esm2","7:3.4.11-0ubuntu0.1+esm3","7:3.4.11-0ubuntu0.1+esm4","7:3.4.11-0ubuntu0.1+esm5","7:3.4.11-0ubuntu0.1+esm6","7:3.4.11-0ubuntu0.1+esm7","7:3.4.11-0ubuntu0.1+esm8","7:3.4.11-0ubuntu0.1+esm9","7:3.4.11-0ubuntu0.1+esm10","7:3.4.11-0ubuntu0.1+esm11","7:3.4.11-0ubuntu0.1+esm12","7:3.4.11-0ubuntu0.1+esm13","7:3.4.11-0ubuntu0.1+esm14","7:3.4.11-0ubuntu0.1+esm15","7:3.4.11-0ubuntu0.1+esm16"],"ecosystem_specific":{"binaries":[{"binary_name":"ffmpeg","binary_version":"7:3.4.11-0ubuntu0.1+esm16"},{"binary_name":"libavcodec-extra","binary_version":"7:3.4.11-0ubuntu0.1+esm16"},{"binary_name":"libavcodec-extra57","binary_version":"7:3.4.11-0ubuntu0.1+esm16"},{"binary_version":"7:3.4.11-0ubuntu0.1+esm16","binary_name":"libavcodec57"},{"binary_name":"libavdevice57","binary_version":"7:3.4.11-0ubuntu0.1+esm16"},{"binary_version":"7:3.4.11-0ubuntu0.1+esm16","binary_name":"libavfilter-extra"},{"binary_version":"7:3.4.11-0ubuntu0.1+esm16","binary_name":"libavfilter-extra6"},{"binary_name":"libavfilter6","binary_version":"7:3.4.11-0ubuntu0.1+esm16"},{"binary_name":"libavformat57","binary_version":"7:3.4.11-0ubuntu0.1+esm16"},{"binary_version":"7:3.4.11-0ubuntu0.1+esm16","binary_name":"libavresample3"},{"binary_name":"libavutil55","binary_version":"7:3.4.11-0ubuntu0.1+esm16"},{"binary_name":"libpostproc54","binary_version":"7:3.4.11-0ubuntu0.1+esm16"},{"binary_version":"7:3.4.11-0ubuntu0.1+esm16","binary_name":"libswresample2"},{"binary_version":"7:3.4.11-0ubuntu0.1+esm16","binary_name":"libswscale4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-125209.json"}},{"package":{"name":"ffmpeg","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":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