{"id":"JLSEC-2026-1189","summary":"FFmpeg versions from 3.0 up to, but not including, 9.0 contain an uninitialized heap memory read...","details":"FFmpeg 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-\u003e`inflated_buf` is copied into the decoded frame, potentially exposing data from prior heap allocations or previous decoded frames in persistent decoding services.","modified":"2026-08-08T23:15:05.811076068Z","published":"2026-08-07T13:27:45.313Z","upstream":["CVE-2026-70629","GHSA-824f-v6qw-342h","EUVD-2026-54161"],"database_specific":{"license":"CC-BY-4.0","sources":[{"html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70629","database_specific":{"status":"Received"},"id":"CVE-2026-70629","imported":"2026-08-08T05:25:26.315Z","modified":"2026-08-07T18:17:21.927Z","published":"2026-08-06T22:18:27.123Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-70629"},{"html_url":"https://github.com/advisories/GHSA-824f-v6qw-342h","id":"GHSA-824f-v6qw-342h","imported":"2026-08-08T05:25:08.359Z","modified":"2026-08-07T18:32:48Z","published":"2026-08-07T00:31:21Z","url":"https://api.github.com/advisories/GHSA-824f-v6qw-342h"},{"html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-54161","id":"EUVD-2026-54161","imported":"2026-08-08T05:24:17.753Z","modified":"2026-08-07T17:11:20Z","published":"2026-08-06T21:25:08Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-54161"}]},"references":[{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/533a6198505edd1379e1cd722852350ae4a85acc"},{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/a5fe21a1a410a680fe93c33b0dd696b7e1c3aea4"},{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/cd1f545cf27ba08f6f5b31b1e92665d7874d4fd7"},{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23895"},{"type":"WEB","url":"https://github.com/advisories/GHSA-824f-v6qw-342h"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70629"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/ffmpeg-uninitialized-heap-memory-read-in-rscc-decoder"}],"affected":[{"package":{"name":"FFMPEG_jll","ecosystem":"Julia","purl":"pkg:julia/FFMPEG_jll?uuid=b22a6f82-2f65-5046-a5b2-351ab43fb4e5"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"9.0.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1189.json"}},{"package":{"name":"FFMPEG_nogpl_jll","ecosystem":"Julia","purl":"pkg:julia/FFMPEG_nogpl_jll?uuid=a6892c6b-5768-548c-b024-ff8dabf482c5"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"9.0.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1189.json"}},{"package":{"name":"FFplay_jll","ecosystem":"Julia","purl":"pkg:julia/FFplay_jll?uuid=c4dce911-e170-5107-8314-c7bdc6785395"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"9.0.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1189.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}