CVE-2020-22021Network attack vector

Process crash via tiny-frame out-of-bounds access

Published May 26, 2021 · Updated Aug 4, 2024

Buffer overflow in FFmpeg 4.2's YADIF filter allows remote attackers to crash the process by supplying a crafted tiny video frame. The filter_edges function processes fixed-width edge regions and advances frame-plane pointers using width-derived offsets that fall outside the arrays for tiny images. Exploitation requires a user or application to process the crafted media with the YADIF filter; the documented consequence is a process crash without confidentiality or integrity impact.

CVSS severity6.5
Medium
EPSS probability1.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in FFmpeg 4.2's YADIF filter allows remote attackers to crash the process by supplying a crafted tiny video frame. The filter_edges function processes fixed-width edge regions and advances frame-plane pointers using width-derived offsets that fall outside the arrays for tiny images. Exploitation requires a user or application to process the crafted media with the YADIF filter; the documented consequence is a process crash without confidentiality or integrity impact.

The record

CVE
CVE-2020-22021
Published
May 26, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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