{"id":"OESA-2026-3471","summary":"ffmpeg security update","details":"FFmpeg is a complete and free Internet live audio and video broadcasting solution for Linux/Unix. It also includes a digital VCR. It can encode in real time in many formats including MPEG1 audio and video, MPEG4, h263, ac3, asf, avi, real, mjpeg, and flash.\r\n\r\nSecurity Fix(es):\n\nFFmpeg versions from 3.0 up to, but not including, 9.0 contain an uninitialized heap memory read vulnerability in the native RSCC decoder (libavcodec/rscc.c) that allows attackers to disclose heap memory contents by supplying a crafted video file with a compressed tile that decompresses fewer bytes than the declared tile geometry requires. When rscc_decode_frame() calls av_image_copy_plane() without validating the decompressed byte count against the tile dimensions, the unwritten suffix of the persistent intermediate buffer ctx->inflated_buf is copied into the decoded frame, potentially exposing data from prior heap allocations or previous decoded frames in persistent decoding services.(CVE-2026-70629)","modified":"2026-08-20T10:15:05.006651687Z","published":"2026-08-20T10:00:44Z","upstream":["CVE-2026-70629"],"database_specific":{"severity":"Medium"},"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3471"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70629"}],"affected":[{"package":{"name":"ffmpeg","ecosystem":"openEuler:24.03-LTS-SP1","purl":"pkg:rpm/openEuler/ffmpeg&distro=openEuler-24.03-LTS-SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.1-42.oe2403sp1"}]}],"ecosystem_specific":{"src":["ffmpeg-6.1.1-42.oe2403sp1.src.rpm"],"x86_64":["ffmpeg-6.1.1-42.oe2403sp1.x86_64.rpm","ffmpeg-debuginfo-6.1.1-42.oe2403sp1.x86_64.rpm","ffmpeg-debugsource-6.1.1-42.oe2403sp1.x86_64.rpm","ffmpeg-devel-6.1.1-42.oe2403sp1.x86_64.rpm","ffmpeg-libs-6.1.1-42.oe2403sp1.x86_64.rpm","libavdevice-6.1.1-42.oe2403sp1.x86_64.rpm"],"aarch64":["ffmpeg-6.1.1-42.oe2403sp1.aarch64.rpm","ffmpeg-debuginfo-6.1.1-42.oe2403sp1.aarch64.rpm","ffmpeg-debugsource-6.1.1-42.oe2403sp1.aarch64.rpm","ffmpeg-devel-6.1.1-42.oe2403sp1.aarch64.rpm","ffmpeg-libs-6.1.1-42.oe2403sp1.aarch64.rpm","libavdevice-6.1.1-42.oe2403sp1.aarch64.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-3471.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"}]}