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CVE Record

CVE-2020-22031: A Heap-based Buffer Overflow vulnerability exists in FFmpeg 4.2 at libavfilter/vf_w3fdif.c in filter16_comp...

A Heap-based Buffer Overflow vulnerability exists in FFmpeg 4.2 at libavfilter/vf_w3fdif.c in filter16_complex_low, which might lead to memory corruption and other potential consequences.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2020-22031 is a reported heap-based buffer overflow in FFmpeg 4.2. It affects media processing code and could cause memory corruption. The provided sources do not include a CVSS score or confirmed active exploitation, so business urgency depends on whether FFmpeg processes untrusted media.

Executive priority

Prioritize if FFmpeg handles untrusted media in customer-facing or automated workflows. Without active exploitation evidence or CVSS data, treat this as an exposure-driven update rather than an emergency across all systems.

Technical view

The issue is described in FFmpeg 4.2, in libavfilter/vf_w3fdif.c within filter16_complex_low. The reported impact is heap-based buffer overflow with possible memory corruption. Debian later issued ffmpeg security updates, but the source bundle does not provide detailed exploitability, CWE mapping, or CVSS metrics.

Likely exposure

Exposure is most likely where FFmpeg 4.2 or affected Debian ffmpeg packages process media from users, partners, or automated pipelines. Internal-only transcoding of trusted files is lower risk, but still needs inventory and update validation.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation evidence. The plausible risk is malicious or malformed media reaching FFmpeg filter processing, but the provided sources do not establish real-world exploitation or reliable exploitation conditions.

Researcher notes

Evidence is incomplete: severity, CVSS, CWE, and structured affected product metadata are missing from the bundle. The strongest facts are the FFmpeg 4.2 code location, memory corruption description, upstream ticket, and Debian security advisories.

Mitigation direction

  • Identify systems and containers using FFmpeg 4.2 or affected Debian ffmpeg packages.
  • Apply Debian DLA 2742-1, DSA-4990, or applicable vendor security updates.
  • Restrict untrusted media processing until patched or otherwise validated.
  • Review FFmpeg upstream ticket 8243 and vendor guidance for exact remediation details.

Validation and detection

  • Check deployed FFmpeg package versions against Debian or vendor fixed versions.
  • Inventory applications, workers, and pipelines that invoke FFmpeg for media processing.
  • Confirm whether services accept user-supplied or externally sourced media files.
  • Verify patched systems are redeployed across containers, hosts, and build images.
Prepared
Confidence
medium
Sources
6

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2020-22031 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
5Source 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.