CVE-2020-22030Network attack vector

Memory corruption via unchecked crossfade input length

Published May 27, 2021 · Updated Aug 4, 2024

Heap buffer overflow in FFmpeg 4.2's acrossfade audio filter allows remote attackers to corrupt memory through crafted audio input. The activate function starts crossfade_samples_fltp after checking only the second input queue, so it processes the configured sample count even when the first input has fewer samples. Processing the crafted media requires user interaction, and the resulting out-of-bounds write can crash the FFmpeg process or corrupt its memory.

CVSS severity8.8
High
EPSS probability1.18%
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's acrossfade audio filter allows remote attackers to corrupt memory through crafted audio input. The activate function starts crossfade_samples_fltp after checking only the second input queue, so it processes the configured sample count even when the first input has fewer samples. Processing the crafted media requires user interaction, and the resulting out-of-bounds write can crash the FFmpeg process or corrupt its memory.

The record

CVE
CVE-2020-22030
Published
May 27, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
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

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

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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-787Out-of-bounds Write
T1204.002Malicious File

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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