CVE-2026-75145

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{"acknowledgement": "Upstream acknowledges Joshua Rogers (AISLE Research) as the original reporter.", "bugzilla": {"description": "ffmpeg: FFmpeg: Out-of-bounds memory access due to integer narrowing conversion", "id": "2519757", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519757"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["FFmpeg before commit b4c199c contains an incorrect integer narrowing conversion in the AV1 RTP packetizer (libavformat/rtpenc_av1.c). The OBU size is cast to long before comparison against the remaining frame size. On targets where long is 32 bits, including 64-bit Windows, sufficiently large OBU size values are sign-flipped by the narrowing cast, producing a negative value that passes the payload size check. This allows an oversized OBU to bypass the safety bound on affected platforms, leading to out-of-bounds memory access when the oversized value is subsequently used as a copy length.", "A flaw was found in FFmpeg. An incorrect integer narrowing conversion in the AV1 RTP packetizer can lead to an out-of-bounds memory access. This occurs when processing specially crafted AV1 RTP (Real-time Transport Protocol) packets, where a large OBU (Operating Block Unit) size is incorrectly handled due to a casting issue on certain platforms. An attacker could exploit this to cause a denial of service or potentially execute arbitrary code."], "mitigation": {"lang": "en:us", "value": "No mitigation is currently available for this flaw."}, "name": "CVE-2026-75145", "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": "2026-08-19T16:27:33Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-75145\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-75145\nhttps://code.ffmpeg.org/FFmpeg/FFmpeg/commit/b4c199c5906ff53368926c2a5839881f41957e7f\nhttps://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24090\nhttps://www.vulncheck.com/advisories/ffmpeg-integer-narrowing-conversion-oob-memory-access-in-av1-rtp-packetizer"], "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 AV1 RTP packetizer (libavformat/rtpenc_av1.c), which is compiled and shipped in all FFmpeg builds across these products. This integer narrowing bug primarily affects platforms where long is 32-bit (e.g. 64-bit Windows). On Linux, long is 64-bit on all supported architectures (x86_64, aarch64, ppc64le, s390x), significantly reducing exploitability. 32-bit architectures (i686, armv7hl) could theoretically be affected.", "threat_severity": "Moderate"}

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