FFMPEG · CVE-2026-125235 · Package
NO FIX YET · SEE WHAT TO DO
FFmpeg's Intel Quick Sync encoder in libavcodec/qsvenc.c reuses an undersized pooled frame buffer when input resolution grows mid-stream. An attacker who supplies a crafted video whose resolution increases can crash the application or corrupt heap memory.
first public Nov 9, 2026 · 2 sources
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Systems that run FFmpeg to transcode untrusted video with Intel Quick Sync encoders, where input resolution can change mid-stream and no rescaling is applied. Deployments that only process trusted media, use other encoders, or do not have Quick Sync are less exposed. unknown whether the sources name other specific conditions.
Not affected if no-qsv-encoder, trusted-input-only
Who cares ffmpeg, intel-quick-sync, media-transcoding
FFmpeg through 9.0.2 contains a heap overflow vulnerability in libavcodec/qsvenc.c that allows attackers to corrupt memory by reusing an undersized pooled QSVFrame buffer when input dimensions increase. Attackers can supply crafted input whose resolution grows mid-stream, transcoded with Intel Quick Sync encoders without rescaling, to crash the application or corrupt heap memory.
This page as .md · .json · CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/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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