{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"ffmpeg/ffmpeg","product":"FFmpeg","source":"CNA: VulnCheck","vendor":"FFmpeg","versions":[{"lessThanOrEqual":"9.0.2","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-125101","cwes":["CWE-908"],"description":"FFmpeg through 9.0.2 contains an information disclosure vulnerability in the VMnc decoder in libavcodec/vmnc.c that restores an unwritten cursor save area into later frames. Attackers can supply a crafted VMnc stream where a frame fails after loading a cursor shape, causing uninitialized heap bytes from screendta to appear in decoded output.","epss":{"date":"2026-11-12","percentile":0.02535,"score":0.00128},"exploits":[],"kev":null,"metrics":[{"score":4.8,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":3.3,"severity":"low","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","version":"3.1"},{"score":4.8,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/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","version":"4.0"},{"score":3.3,"severity":"low","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","version":"3.1"}],"modifiedAt":1794573843612,"publishedAt":1794251456303,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking"],"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25716"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/FFmpeg/FFmpeg/commit/50865f20b1f474e6b11735c88f668751bc9aa528"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/vmnc.c#L348"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://github.com/FFmpeg/FFmpeg"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-vmnc-decoder-uninitialized-heap-memory-disclosure"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25716"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/FFmpeg/FFmpeg"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/vmnc.c#L348"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/FFmpeg/FFmpeg/commit/50865f20b1f474e6b11735c88f668751bc9aa528"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-vmnc-decoder-uninitialized-heap-memory-disclosure"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/FFmpeg/FFmpeg/commit/50865f20b1f474e6b11735c88f668751bc9aa528"}],"revision":"c36ab57bf7fda9380e3c2ba12395a0c64d50f2509119e03bde7898bef1bbdb93","sources":[{"modifiedAt":1794573843612,"name":"CNA: VulnCheck","retrievedAt":1794575341394,"url":"https://www.cve.org/CVERecord?id=CVE-2026-125101"},{"modifiedAt":1794347193753,"name":"NVD","retrievedAt":1794356397403,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-125101"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794550541213,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-125101"}],"ssvc":{"assessedAt":1794573762178,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"FFmpeg through 9.0.2 VMnc Decoder Uninitialized Heap Memory Disclosure","updatedAt":1794575341394}