CVE-2020-22022Public exploitNetwork attack vector

Memory corruption via short-frame line stepping

Published May 27, 2021 · Updated Aug 4, 2024

Heap buffer overflow in FFmpeg 4.2 allows remote attackers to corrupt memory by processing crafted video through the fieldorder filter. In libavfilter/vf_fieldorder.c, filter_frame advances source and destination pointers by full line strides for frames no more than two rows high, moving later copies beyond their buffers. Exploitation requires a user or application to process attacker-supplied media with fieldorder; the established consequence is memory corruption.

CVSS severity8.8
High
EPSS probability1.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in FFmpeg 4.2 allows remote attackers to corrupt memory by processing crafted video through the fieldorder filter. In libavfilter/vf_fieldorder.c, filter_frame advances source and destination pointers by full line strides for frames no more than two rows high, moving later copies beyond their buffers. Exploitation requires a user or application to process attacker-supplied media with fieldorder; the established consequence is memory corruption.

The record

CVE
CVE-2020-22022
Published
May 27, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 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

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

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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