CVE-2026-52295 FFmpeg CVE debrief

Who should care

Defenders responsible for FFmpeg deployments, media file processing, and vulnerability management should assess exposure and prioritize verification and remediation efforts. This includes reviewing and updating incident response plans, ensuring that security teams are aware of the vulnerability and its potential impacts, and implementing compensating controls to detect and prevent exploitation attempts.

Why it matters

CVE-2026-52295 is a low-severity vulnerability affecting FFmpeg versions 7.0 and later, requiring verification and potential remediation efforts from defenders responsible for FFmpeg deployments and media file processing.

• Verify FFmpeg versions and configurations to prevent potential issues with malformed media files.
• Implement compensating controls to detect and prevent exploitation attempts.
• Monitor media file processing for potential issues and implement error handling and bounds checking.

Technical summary

FFmpeg before 9.0 has an out-of-bounds read vulnerability due to insufficient padding in extradata before GetBitContext-based access in libavformat/iamf_writer.c. This vulnerability affects FFmpeg versions 7.0 and later, with a CVSS score of 2.9 and severity LOW. Defenders should prioritize verifying FFmpeg versions and configurations, especially those handling media files with potentially malformed extradata, and implement compensating controls to detect and prevent exploitation attempts. The vulnerability can be mitigated by verifying FFmpeg versions and configurations, reviewing media file handling and processing, and monitoring for potential issues.

Defensive priority

Defenders should prioritize verifying FFmpeg versions and configurations, especially those handling media files with potentially malformed extradata.

Recommended defensive actions

• Verify FFmpeg versions and configurations to ensure they are up-to-date and properly configured.
• Review media file handling and processing to ensure proper error handling and bounds checking.
• Monitor for potential issues with malformed media files and implement compensating controls as needed.
• Implement additional logging and monitoring for media file processing.
• Conduct regular vulnerability assessments and penetration testing.
• Review and update incident response plans to include potential exploitation scenarios.
• Ensure that security teams are aware of the vulnerability and its potential impacts.

Evidence notes

The official CVE Program record and the NVD entry describe the vulnerability as affecting FFmpeg versions 7.0 and later, with a CVSS score of 2.9 and severity LOW. The vulnerability is caused by an out-of-bounds read due to insufficient padding in extradata before GetBitContext-based access in libavformat/iamf_writer.c. Defenders should verify FFmpeg versions and configurations, especially those handling media files with potentially malformed extradata.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.