{"id":"CVE-2026-120243","aliases":[],"cve":{"records":[{"id":"CVE-2026-120243","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-31T22:05:52.181Z","published":"2026-11-01T00:57:09.338Z","modified":"2026-11-06T18:55:15.270Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-11-01T00:57:09.338Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-06T18:55:15.270Z"}],"references":[{"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24858","tags":["issue-tracking"],"source":"VulnCheck"},{"url":"https://github.com/FFmpeg/FFmpeg/commit/edad2d0dafcf44fa315eab716fd0183ce808053b","tags":["patch"],"source":"VulnCheck"},{"url":"https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/g2meet.c#L1040-L1042","tags":["technical-description"],"source":"VulnCheck"},{"url":"https://github.com/FFmpeg/FFmpeg","tags":["product"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/ffmpeg-2.0-through-9.0.2-information-disclosure-via-g2m-kempf-palette","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-457","description":"Use of Uninitialized Variable","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*","versionStartIncluding":"2.0","versionEndIncluding":"9.0.2"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-06T18:55:04.988121Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"FFmpeg 2.0 through 9.0.2 Information Disclosure via G2M Kempf Palette","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"FFmpeg 2.0 through 9.0.2 contains a use of uninitialized variable vulnerability in the Go2Meeting decoder that allows attackers to leak stack memory through out-of-range palette indices. Attackers can craft a G2M3/G2M4 stream with a short Kempf palette so kempf_restore_buf() copies uninitialized stack bytes, including pointers or stack guards, into decoded output.","score":6.8,"severity":"medium","published":"2026-11-01T00:57:09.338Z","modified":"2026-11-06T18:55:15.270Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"FFmpeg","name":"FFmpeg","platforms":[],"versions":[{"version":"2.0","status":"affected","lessThanOrEqual":"9.0.2","versionType":"custom"}],"defaultStatus":"unaffected","packageURL":"pkg:github/ffmpeg/ffmpeg","cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-120243"}],"remediation":[],"references":["https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24858","https://github.com/FFmpeg/FFmpeg/commit/edad2d0dafcf44fa315eab716fd0183ce808053b","https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/g2meet.c#L1040-L1042","https://github.com/FFmpeg/FFmpeg","https://www.vulncheck.com/advisories/ffmpeg-2.0-through-9.0.2-information-disclosure-via-g2m-kempf-palette"],"sources":[{"name":"CVE","id":"CVE-2026-120243","modified":"2026-11-06T18:55:15.270Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-120243"}],"assessments":[{"source":"VulnCheck","vector":"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","score":6.8},{"source":"VulnCheck","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","score":5.5}],"sourceAffected":[],"observedAt":"2026-11-06T19:32:37.620Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T03:00:33.317Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-01T02:05:38.094Z","attemptedAt":"2026-11-01T02:05:38.094Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-01T02:05:38.525Z","attemptedAt":"2026-11-01T02:05:38.525Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-01T02:05:38.364Z","attemptedAt":"2026-11-01T02:05:38.364Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-01T02:05:37.453Z","attemptedAt":"2026-11-01T02:05:37.453Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-120243","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-120243","modified":"2026-11-01T01:17:17.593","score":6.8,"vector":"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","checkedAt":"2026-11-01T02:05:38.094Z"},{"source":"NVD","id":"CVE-2026-120243","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-120243","modified":"2026-11-01T01:17:17.593","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","checkedAt":"2026-11-01T02:05:38.094Z"}],"aiSummary":{"text":"FFmpeg 2.0 through 9.0.2 has a use of uninitialized variable vulnerability in the Go2Meeting decoder, allowing attackers to leak stack memory through out-of-range palette indices. Attackers can craft a malicious G2M3/G2M4 stream to exploit this weakness. The impact is information disclosure.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-01T01:56:06.264Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-120243"}]}}