CVE-2026-125205 · Package
NO FIX YET
FFmpeg's av1_frame_merge bitstream filter buffers AV1 data without limit when a temporal delimiter is never sent. A crafted .obu file opened by the AV1 OBU or Annex B demuxer can exhaust memory and cause a denial of service.
first public Nov 9, 2026 · 1 source
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Systems that run FFmpeg to open AV1 OBU or Annex B files from untrusted sources can be exposed to memory exhaustion. Setups that only process trusted media, or do not use the av1_frame_merge filter, are less exposed. The sources do not say which ffmpeg versions are fixed.
Not affected if filter-unused, trusted-input-only
Who cares av1, ffmpeg, media-processing
ffmpeg -version; affected releases are listed as through 9.0.2No fix yet, per the sources.
FFmpeg through 9.0.2 contains an unbounded memory allocation vulnerability in the av1_frame_merge bitstream filter that allows attackers to exhaust memory by never sending a temporal delimiter OBU. Attackers can supply a crafted .obu file opened by the AV1 OBU or Annex B demuxers, forcing unlimited OBU buffering per temporal unit and causing denial of service.
This page as .md · .json · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
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