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CVE Record

CVE-2020-22027: A heap-based Buffer Overflow vulnerability exits in FFmpeg 4.2 in deflate16 at libavfilter/vf_neighbor.c, w...

A heap-based Buffer Overflow vulnerability exits in FFmpeg 4.2 in deflate16 at libavfilter/vf_neighbor.c, 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-2020-22027 describes a heap-based buffer overflow in FFmpeg 4.2, in libavfilter/vf_neighbor.c. In business terms, FFmpeg deployments that process media could experience memory corruption if the vulnerable code path is reached. The public bundle does not provide a CVSS score, confirmed exploit status, or complete affected-version range.

Executive priority

Prioritize inventory and vendor-patch verification, especially for systems processing external media. Urgency is constrained by incomplete severity and exploit evidence, but memory corruption in a media parser/filter library can affect operational resilience and security controls.

Technical view

The CVE states that FFmpeg 4.2 contains a heap-based buffer overflow in deflate16 within libavfilter/vf_neighbor.c, with possible memory corruption and other consequences. Sources include an FFmpeg Trac ticket, a debugger attachment, and Debian advisory DSA-4990. No CWE, CVSS vector, or authoritative complete version matrix is provided.

Likely exposure

Most likely exposure is systems that package or run FFmpeg 4.2, especially media-processing services, transcoders, ingestion workflows, containers, or desktops using FFmpeg filters. The source bundle does not identify specific downstream products or a complete affected-version range.

Exploitation context

The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. Public references indicate upstream and Debian tracking, including a debugger attachment, but the provided evidence is insufficient to assess exploit maturity or real-world abuse.

Researcher notes

Do not assume more than the sources state: FFmpeg 4.2, heap overflow, deflate16, vf_neighbor.c, possible memory corruption. CVSS, CWE, exploit status, and complete affected/fixed version data are absent from the bundle. Debian DSA-4990 should be treated as the main remediation reference.

Mitigation direction

  • Inventory FFmpeg installations and identify any version 4.2 deployments.
  • Review upstream FFmpeg ticket 8242 and Debian DSA-4990 for vendor guidance.
  • Update FFmpeg using trusted OS or vendor packages when fixes are available.
  • Reduce exposure of untrusted media-processing workflows until version status is resolved.
  • Monitor vendor advisories for affected-version and fixed-version clarification.

Validation and detection

  • Check installed FFmpeg versions across servers, containers, desktops, and CI images.
  • Confirm whether deployed builds include libavfilter/vf_neighbor.c code from FFmpeg 4.2.
  • Map media-processing services that accept files from users, partners, or the internet.
  • Verify patch status against Debian DSA-4990 or the relevant package vendor advisory.
  • Record residual exposure where fixed-version guidance is unavailable.
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-2020-22027 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.