Memory Leak in FFmpeg via VAAPI Decode

Executive Summary

This vulnerability is a memory leak in FFmpeg versions up to 9.0.2. It occurs in the VAAPI video decoding component where attackers can craft malicious H.264 or other video streams that cause slice parsing errors on every frame. This leads to continuous memory leaks of VA parameter buffers, slice buffers, driver memory, and heap memory.

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Detection Guidance

Detecting this vulnerability requires monitoring for unusual memory consumption during video processing. Check for processes using FFmpeg with high memory usage, especially when handling H.264 or VAAPI-decoded streams. Use system monitoring tools like 'top', 'htop', or 'ps' to track memory leaks in FFmpeg processes.

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Impact Analysis

The memory leak can exhaust system memory over time, causing performance degradation, crashes, or denial of service. Local attackers with access to craft video files could exploit this to destabilize applications or systems using FFmpeg for video processing.

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Compliance Impact

This vulnerability primarily causes memory exhaustion through continuous leaks of VA parameter buffers, slice buffers, driver memory, and heap memory during video decoding. While not directly violating GDPR or HIPAA, such memory leaks could lead to system instability or crashes, potentially disrupting services handling sensitive data. GDPR requires ensuring data processing integrity and security, while HIPAA mandates safeguards against unauthorized access or disruptions. Unpatched systems may fail to meet these requirements due to resource exhaustion.

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Mitigation Strategies

Immediately update FFmpeg to the latest patched version. Disable VAAPI hardware acceleration if not required. Monitor memory usage of FFmpeg processes closely. Restrict untrusted video processing to sandboxed environments until patched.

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