{"id":"UBUNTU-CVE-2026-66037","details":"FFmpeg through 8.1.2, fixed in commit 5d7112c, contains an uncontrolled resource consumption vulnerability in the IAMF demuxer that allows an unauthenticated attacker to cause multi-gigabyte memory allocation from a 17-byte input file by supplying a crafted count_label field. The mix_presentation_obu() function in libavformat/iamf_parse.c calls av_calloc(count_label, sizeof(*language_label)) with an attacker-controlled value before validating available OBU data, enabling an allocation amplification of approximately 126 million bytes per input byte that exhausts process memory or triggers an OOM-kill during format probing.","modified":"2026-09-10T00:45:12.292727447Z","published":"2026-07-24T20:18:00Z","upstream":["CVE-2026-66037"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-66037"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-66037"},{"type":"REPORT","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23627"},{"type":"REPORT","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/86708357d126af84c16f80d9c57335d1e8c845c5"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/ffmpeg-iamf-demuxer-uncontrolled-resource-consumption-via-mix-presentation-obu"}],"affected":[{"package":{"name":"ffmpeg","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7:7.1.1-1ubuntu4","7:7.1.2-1ubuntu3","7:7.1.2-1ubuntu4","7:7.1.3-1ubuntu1","7:8.0.1-2ubuntu1","7:8.0.1-3ubuntu1","7:8.0.1-3ubuntu2","7:8.0.1-3ubuntu2+esm1","7:8.0.1-3ubuntu2+esm3","7:8.0.1-3ubuntu2+esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"ffmpeg","binary_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_name":"libavcodec-extra","binary_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_name":"libavcodec-extra62","binary_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_name":"libavcodec62","binary_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_version":"7:8.0.1-3ubuntu2+esm4","binary_name":"libavdevice62"},{"binary_name":"libavfilter-extra","binary_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_version":"7:8.0.1-3ubuntu2+esm4","binary_name":"libavfilter-extra11"},{"binary_name":"libavfilter11","binary_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_version":"7:8.0.1-3ubuntu2+esm4","binary_name":"libavformat-extra"},{"binary_version":"7:8.0.1-3ubuntu2+esm4","binary_name":"libavformat-extra62"},{"binary_name":"libavformat62","binary_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_version":"7:8.0.1-3ubuntu2+esm4","binary_name":"libavutil60"},{"binary_version":"7:8.0.1-3ubuntu2+esm4","binary_name":"libswresample6"},{"binary_version":"7:8.0.1-3ubuntu2+esm4","binary_name":"libswscale9"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66037.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}