CVE-2026-75147 PUBLISHED

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

Assigner: VulnCheck
Reserved: 17.08.2026 Published: 19.08.2026 Updated: 19.08.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score: 6.9

Product Status

Vendor FFmpeg
Product FFmpeg
Versions Default: unaffected
  • affected from 0 to 983dae9c19f46c87d597598c0fd2f2fcee0ad2f8 (excl.)

Credits

  • Joshua Rogers (AISLE Research) finder

References

Problem Types

  • Out-of-bounds Read CWE