{"apiVersion":"1.0","identifier":"CVE-2026-75145","description":"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.","publishedAt":"2026-08-19T17:21:12","lastModifiedAt":"2026-08-21T20:16:42","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-75145","cvssScore":5.8,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H","epssProbability":0.00117,"riskScore":0.59,"affectedProduct":"FFmpeg","affectedVersions":"unknown","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-75145","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-75145","en":"https://www.redsauce.net/en/cves/CVE-2026-75145","fr":"https://www.redsauce.net/fr/cves/CVE-2026-75145","pt":"https://www.redsauce.net/pt/cves/CVE-2026-75145","de":"https://www.redsauce.net/de/cves/CVE-2026-75145","sk":"https://www.redsauce.net/sk/cves/CVE-2026-75145","el":"https://www.redsauce.net/el/cves/CVE-2026-75145"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-75145"}}