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CVE Record

CVE-2020-22026: Buffer Overflow vulnerability exists in FFmpeg 4.2 in the config_input function at libavfilter/af_tremolo.c...

Buffer Overflow vulnerability exists in FFmpeg 4.2 in the config_input function at libavfilter/af_tremolo.c, which could let a remote malicious user cause a Denial of Service.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This CVE describes a buffer overflow in FFmpeg 4.2 that can crash media processing through the tremolo audio filter path. The documented impact is denial of service, not data theft or code execution. Business urgency depends on whether FFmpeg processes untrusted media or user-controlled filter settings in production services.

Executive priority

Treat as a service availability risk. Prioritize remediation where FFmpeg handles customer-supplied media, automated transcoding, or public-facing processing jobs. Lower priority is reasonable for isolated systems that do not process untrusted media and are not running affected versions.

Technical view

The issue is reported in FFmpeg 4.2, in config_input within libavfilter/af_tremolo.c. Public CVE text describes a buffer overflow allowing a remote malicious user to cause denial of service. The source bundle does not provide CVSS, CWE, precise affected ranges beyond FFmpeg 4.2, or detailed fixed-version information.

Likely exposure

Exposure is most likely in systems running FFmpeg 4.2 or affected Debian ffmpeg packages, especially media-processing services that handle untrusted input. Exact triggering conditions are not fully described in the supplied sources, so confirm whether libavfilter and tremolo-related processing are reachable.

Exploitation context

The source bundle does not cite CISA KEV listing or active exploitation. Available evidence supports denial-of-service risk from crafted or malicious remote interaction, but does not support claims of code execution, ransomware use, or broad exploitation in the wild.

Researcher notes

Evidence is sparse. The CVE record identifies function and file location, while Debian references confirm security-update handling. The bundle does not include a CVSS vector, root-cause analysis, proof of exploitation, or comprehensive affected-version range, so avoid over-scoping without vendor confirmation.

Mitigation direction

  • Inventory FFmpeg versions across servers, containers, build images, and media workers.
  • Apply relevant FFmpeg or distribution security updates, especially Debian DSA-4990 and DLA-2742-1 guidance.
  • Avoid processing untrusted media with exposed FFmpeg filter paths until patched.
  • Restrict who can submit filter parameters or processing jobs to FFmpeg services.
  • Monitor vendor advisories for exact fixed versions if not using Debian packages.

Validation and detection

  • Check installed FFmpeg package versions against vendor security advisories.
  • Confirm whether production workflows invoke libavfilter or tremolo-related audio filtering.
  • Review crash logs for FFmpeg worker failures or repeated media-processing aborts.
  • Test patched FFmpeg builds in staging with normal media workloads.
  • Verify container and server images no longer include vulnerable FFmpeg builds.
Prepared
Confidence
medium
Sources
5

Public sources used

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

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2020-22026 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.