{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64834", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-07-20T18:27:48.161Z", "datePublished": "2026-07-22T17:06:07.659Z", "dateUpdated": "2026-07-22T17:06:07.659Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-07-22T17:06:07.659Z"}, "title": "FFmpeg 0.6.3 - 8.1.2 Infinite Loop DoS via RTP/ASF Demuxer", "descriptions": [{"lang": "en", "value": "FFmpeg versions 0.6.3 through 8.1.2 contain an infinite loop vulnerability in the RTP/ASF demuxer within libavformat/rtpdec_asf.c that allows remote attackers to cause denial of service by sending a crafted RTP/ASF stream. The rtp_asf_fix_header function fails to validate a minimum chunksize when iterating over ASF objects, causing the loop pointer to never advance when a chunksize is smaller than the 24-byte minimum ASF object header size, resulting in CPU exhaustion that denies service to legitimate users."}], "tags": ["x_open-source"], "datePublic": "2026-07-02T00:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-835", "description": "Loop with Unreachable Exit Condition ('Infinite Loop')", "type": "CWE"}]}], "affected": [{"defaultStatus": "affected", "vendor": "FFmpeg", "product": "FFmpeg", "versions": [{"status": "affected", "version": "0.6.3", "versionType": "semver", "lessThanOrEqual": "8.1.2"}, {"status": "affected", "version": "11d5f475be95d22d5f0692220cc772b116abc632", "versionType": "git"}], "repo": "https://code.ffmpeg.org/FFmpeg/FFmpeg"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.7, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "version": "3.1", "baseSeverity": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}}], "references": [{"url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23663", "name": "Pull Request", "tags": ["issue-tracking"]}, {"url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/11d5f475be95d22d5f0692220cc772b116abc632", "name": "Patch Commit", "tags": ["patch"]}, {"url": "https://www.vulncheck.com/advisories/ffmpeg-infinite-loop-dos-via-rtp-asf-demuxer", "tags": ["third-party-advisory"]}], "credits": [{"lang": "en", "value": "Pavel Kohout, Aisle Research", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "vulncheck"}}}}

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