{"id":"UBUNTU-CVE-2026-66041","details":"FFmpeg 7.0 through 8.1.2, fixed in commit 4da9812, contains a heap out-of-bounds write vulnerability in the vf_quirc filter that allows an attacker to corrupt heap memory by supplying a crafted PGS/SUP subtitle file with mismatched frame dimensions. Attackers can provide a subtitle file whose second presentation has larger dimensions than its first, causing av_image_copy_plane() to copy data exceeding the initial allocation size into the undersized libquirc grayscale image buffer, resulting in heap corruption and process crash with potential for code execution.","modified":"2026-09-10T00:45:12.305910527Z","published":"2026-07-24T20:18:00Z","upstream":["CVE-2026-66041"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-66041"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-66041"},{"type":"REPORT","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23625"},{"type":"REPORT","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/4da9812e25894fb51d62a8875cfa8eb39b5e20f5"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/ffmpeg-heap-out-of-bounds-write-via-vf-quirc-filter"}],"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_version":"7:8.0.1-3ubuntu2+esm4","binary_name":"libavcodec-extra"},{"binary_name":"libavcodec-extra62","binary_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_version":"7:8.0.1-3ubuntu2+esm4","binary_name":"libavcodec62"},{"binary_version":"7:8.0.1-3ubuntu2+esm4","binary_name":"libavdevice62"},{"binary_name":"libavfilter-extra","binary_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_name":"libavfilter-extra11","binary_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_name":"libavfilter11","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_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_name":"libavformat62","binary_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_version":"7:8.0.1-3ubuntu2+esm4","binary_name":"libavutil60"},{"binary_name":"libswresample6","binary_version":"7:8.0.1-3ubuntu2+esm4"},{"binary_name":"libswscale9","binary_version":"7:8.0.1-3ubuntu2+esm4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66041.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:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}