{"id":"JLSEC-2026-1190","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 Screenpresso decoder (`libavcodec/screenpresso.c`) that allows attackers to recover sensitive memory contents by supplying a crafted SPV1 packet with a valid zlib stream that decompresses fewer bytes than the full frame requires. The `screenpresso_decode_frame()` function fails to validate the produced byte count before calling `av_image_copy_plane()` to copy the complete frame dimensions from the persistent ctx-\u003e`inflated_buf` buffer, causing unwritten heap memory from prior allocations or prior frames to be copied into decoded output and potentially exposing sensitive data such as userspace addresses from persistent decoding services.","modified":"2026-08-08T23:15:05.845057817Z","published":"2026-08-07T13:27:45.313Z","upstream":["CVE-2026-70630","GHSA-7mrq-j773-6867","EUVD-2026-54162"],"database_specific":{"license":"CC-BY-4.0","sources":[{"published":"2026-08-06T22:18:27.273Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-70630","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70630","database_specific":{"status":"Received"},"id":"CVE-2026-70630","imported":"2026-08-08T05:25:13.970Z","modified":"2026-08-07T18:17:22.057Z"},{"published":"2026-08-07T00:31:21Z","url":"https://api.github.com/advisories/GHSA-7mrq-j773-6867","html_url":"https://github.com/advisories/GHSA-7mrq-j773-6867","id":"GHSA-7mrq-j773-6867","imported":"2026-08-08T05:25:32.831Z","modified":"2026-08-07T18:31:42Z"},{"published":"2026-08-06T21:25:31Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-54162","html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-54162","id":"EUVD-2026-54162","imported":"2026-08-08T05:24:17.732Z","modified":"2026-08-07T17:11:40Z"}]},"references":[{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/705890061467ad550ecc1dad5eea07f28ccfb43e"},{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/9a3202a98b2e095b54dd784c3e01a09a676fc3fa"},{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/c22667d0fd7916a33fd3e79685b7246fc48f1a62"},{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23896"},{"type":"WEB","url":"https://github.com/advisories/GHSA-7mrq-j773-6867"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70630"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/ffmpeg-uninitialized-heap-memory-read-in-screenpresso-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-2026-1190.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-2026-1190.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-2026-1190.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"}]}