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CVE-2026-75147 - FFmpeg Out-of-Bounds Read in AV1 RTP Packetizer via rtpenc_av1.c

CVE ID : CVE-2026-75147 Published : Aug. 19, 2026, 4:29 p. m. • 39 minutes ago Description : FFmpeg before commit 983dae9 contains an out-of-bounds read in the AV1 RTP packetizer (libavformat/rtpenc_av1. c). The keyframe detection loop that searches for a sequence header OBU advanced its pointer and remaining-size counter by the encoded header length plus the OBU payload size without first bounding the OBU size against the remaining data. A crafted OBU size causes the remaining-size counter to wrap to a positive value, causing the next loop iteration to dereference a pointer beyond the end of the packet buffer. A crafted AV1 input packet muxed to RTP triggers the out-of-bounds read. Severity: 7.1 • HIGH Visit the link for more details, such as CVSS details, affected products, timeline, and more...