CVE-2026-75146

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{"acknowledgement": "Upstream acknowledges Joshua Rogers (AISLE Research) as the original reporter.", "bugzilla": {"description": "ffmpeg: FFmpeg: Information disclosure and denial of service via out-of-bounds read in DASH demuxer", "id": "2519764", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519764"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["FFmpeg before commit 65b0dab contains an out-of-bounds read in the DASH demuxer (libavformat/dashdec.c). When a live DASH manifest is refreshed with a startNumber that is lower than the previous value, the current sequence number is driven negative. The fragment retrieval function checked only the upper bound before indexing the fragments array, allowing a negative index to be used and causing an out-of-bounds read. A malicious or misconfigured DASH server can trigger this by serving a live manifest with a decreasing startNumber across a manifest refresh.", "A flaw was found in FFmpeg. A malicious or misconfigured DASH (Dynamic Adaptive Streaming over HTTP) server can exploit an out-of-bounds read vulnerability in the DASH demuxer. This occurs when a live DASH manifest is refreshed with a startNumber that is lower than the previous value, causing a negative index to be used in the fragment retrieval function. Successful exploitation could lead to information disclosure or a denial of service."], "mitigation": {"lang": "en:us", "value": "No mitigation is currently available for this flaw."}, "name": "CVE-2026-75146", "package_state": [{"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "ffmpeg", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-vllm-gaudi-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}], "public_date": "2026-08-19T16:28:19Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-75146\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-75146\nhttps://code.ffmpeg.org/FFmpeg/FFmpeg/commit/65b0dab903e5975e036b30ecc58f5935d4f151e0\nhttps://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24093\nhttps://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-read-in-dash-demuxer-via-dashdec-c"], "statement": "The ffmpeg package is not shipped in base Red Hat Enterprise Linux. It is available through EPEL, Red Hat Enterprise Linux AI, and as a bundled dependency in Red Hat OpenShift AI container images. The vulnerable code resides in the DASH demuxer (libavformat/dashdec.c), which is compiled and shipped in all FFmpeg builds across these products. Exploitation requires a malicious or misconfigured DASH server to serve a live manifest with a decreasing startNumber across a refresh.", "threat_severity": "Important"}

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