{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-125182", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-09T18:15:06.141Z", "datePublished": "2026-11-09T19:11:07.513Z", "dateUpdated": "2026-11-09T19:11:07.513Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-09T19:11:07.513Z"}, "datePublic": "2026-09-29T00:00:00.000Z", "title": "FFmpeg through 9.0.2 Out-of-Bounds Read via Cook Decoder js_subband_start", "descriptions": [{"lang": "en", "value": "FFmpeg through 9.0.2 contains an out-of-bounds read vulnerability in the Cook decoder joint_decode() function because cook_decode_init() does not check js_subband_start against subbands. Attackers can supply a crafted RealMedia file whose extradata causes reads past decode_buffer_0, leaking pointers and decoder state into decoded audio to help defeat ASLR."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Out-of-bounds Read", "cweId": "CWE-125", "type": "CWE"}]}], "affected": [{"vendor": "FFmpeg", "product": "FFmpeg", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThanOrEqual": "9.0.2", "status": "affected", "versionType": "semver"}], "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:*:*:*:*:*:*:*:*", "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:L/VI:N/VA:N/SC:N/SI:N/SA:N", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseScore": 3.3, "baseSeverity": "LOW"}}], "references": [{"url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24763", "tags": ["issue-tracking"]}, {"url": "https://github.com/FFmpeg/FFmpeg/commit/7145d13201c9f9c5253f40295714faa4f4ada1a0", "tags": ["patch"], "name": "Patch Commit"}, {"url": "https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/cook.c#L854", "tags": ["technical-description"]}, {"url": "https://github.com/FFmpeg/FFmpeg", "tags": ["product"]}, {"name": "VulnCheck Advisory: FFmpeg through 9.0.2 Out-of-Bounds Read via Cook Decoder js_subband_start", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-out-of-bounds-read-via-cook-decoder-js-subband-start"}], "credits": [{"lang": "en", "value": "Yuyao Jiang", "type": "finder"}, {"lang": "en", "value": "Joshua Rogers (AISLE Research)", "type": "reporter"}, {"lang": "en", "value": "Michael Niedermayer", "type": "remediation developer"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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