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CVE-2025-12343 — Ffmpeg: double-free vulnerability in ffmpeg tensorflow dnn backend

Affected: ffmpeg

A flaw was found in FFmpeg’s TensorFlow backend within the libavfilter/dnn_backend_tf.c source file. The issue occurs in the dnn_execute_model_tf() function, where a task object is freed multiple times in certain error-handling paths. This redundant memory deallocation can lead to a double-free condition, potentially causing FFmpeg or any application using it to crash when processing TensorFlow-based DNN models. This results in a denial-of-service scenario but does not allow arbitrary code execution under normal conditions.

USN-8469-1 — ffmpeg vulnerabilities

Affected: Ubuntu:Pro:20.04:LTS: ffmpeg, Ubuntu:Pro:22.04:LTS: ffmpeg, Ubuntu:Pro:24.04:LTS: ffmpeg, Ubuntu:Pro:26.04:LTS: ffmpeg

Jiasheng Jiang discovered that FFmpeg incorrectly handled memory in certain error-handling paths of its TensorFlow DNN backend. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 24.04 LTS. (CVE-2025-12343)

Quang Luong discovered that FFmpeg incorrectly handled certain subsample data. An attacker could possibly use this issue to cause a denial of service or possibly execute arbitrary code. (CVE-2026-40962)