{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-120243","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-10-31T22:05:52.181Z","datePublished":"2026-11-01T00:57:09.338Z","dateUpdated":"2026-11-01T00:57:09.338Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-01T00:57:09.338Z"},"datePublic":"2026-10-10T00:00:00.000Z","title":"FFmpeg 2.0 through 9.0.2 Information Disclosure via G2M Kempf Palette","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Use of Uninitialized Variable","cweId":"CWE-457","type":"CWE"}]}],"affected":[{"vendor":"FFmpeg","product":"FFmpeg","defaultStatus":"unaffected","versions":[{"version":"2.0","lessThanOrEqual":"9.0.2","status":"affected","versionType":"custom"}],"packageURL":"pkg:github/ffmpeg/ffmpeg","repo":"https://code.ffmpeg.org/FFmpeg/FFmpeg"}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*","versionStartIncluding":"2.0","versionEndIncluding":"9.0.2"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5.5,"baseSeverity":"MEDIUM"}}],"references":[{"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24858","tags":["issue-tracking"]},{"url":"https://github.com/FFmpeg/FFmpeg/commit/edad2d0dafcf44fa315eab716fd0183ce808053b","tags":["patch"]},{"url":"https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/g2meet.c#L1040-L1042","tags":["technical-description"]},{"url":"https://github.com/FFmpeg/FFmpeg","tags":["product"]},{"name":"VulnCheck Advisory: FFmpeg 2.0 through 9.0.2 Information Disclosure via G2M Kempf Palette","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/ffmpeg-2.0-through-9.0.2-information-disclosure-via-g2m-kempf-palette"}],"credits":[{"lang":"en","value":"Adrian Junge (vurlo)","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}