CVE-2009-4634: Multiple integer underflows in FFmpeg 0.5 allow remote attackers to cause a denial of service and possibly...

Security readout for executives and security teams

CVE-2009-4634 is an old FFmpeg media-parsing flaw. A specially crafted media file could crash a vulnerable parser and may allow code execution. Business risk is highest where legacy FFmpeg 0.5 or affected downstream packages process untrusted uploads, email attachments, or web content. Exposure is most plausible in legacy systems running FFmpeg 0.5 or vendor-packaged derivatives that decode untrusted media. Modern systems may still be exposed if old static FFmpeg builds are embedded in applications, appliances, or media workflows. Prioritize remediation where media processing is internet-facing or handles customer-supplied files. For isolated archival systems, handle through normal legacy-risk cleanup, but document any unsupported FFmpeg dependency. Mitigation focus: Identify and retire FFmpeg 0.5 deployments and embedded builds.; Apply relevant vendor updates from your Linux distribution or FFmpeg supplier.; Restrict untrusted media parsing to isolated, least-privileged workers..

Prepared

Jun 28, 2026, 03:36 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.