CVE-2018-9841: The export function in libavfilter/vf_signature.c in FFmpeg through 3.4.2 allows remote attackers to cause...

Security readout for executives and security teams

FFmpeg through 3.4.2 contains a flaw in its signature-filter export handling. A remote attacker may be able to crash affected processing by supplying an overly long filename. The public record also says other unspecified impact is possible, but does not provide enough detail to confirm broader consequences. Exposure is most likely where FFmpeg through 3.4.2 processes untrusted or remotely supplied filenames in media workflows using the affected signature filter path. Treat this as a focused availability risk for services that process media from users or external systems. Prioritize internet-facing or automated media pipelines using old FFmpeg builds. Mitigation focus: Inventory FFmpeg deployments and package versions across servers, containers, and build images.; Replace FFmpeg through 3.4.2 with a vendor-supported build containing the referenced upstream fix.; Review Gentoo or operating-system vendor advisories for package-specific update guidance..

Prepared

Jun 7, 2026, 14:03 UTC (UTC+00:00)

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