CVE-2022-3965Network attack vector

Encoding interruption via partial-block frame over-read

Published Nov 13, 2022 · Updated Aug 3, 2024

Out-of-bounds read in FFmpeg 5.0 through 5.0.2 and 5.1 through 5.1.2 allows remote attackers to interrupt encoding via crafted video. smc_encode_stream processes four rows per block even when the frame height leaves fewer, causing memcmp and memcpy to read past the frame buffer. Processing attacker-supplied video through the SMC encoder requires user interaction; successful triggering crashes the encoding process.

CVSS severity4.3
Medium
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in FFmpeg 5.0 through 5.0.2 and 5.1 through 5.1.2 allows remote attackers to interrupt encoding via crafted video. smc_encode_stream processes four rows per block even when the frame height leaves fewer, causing memcmp and memcpy to read past the frame buffer. Processing attacker-supplied video through the SMC encoder requires user interaction; successful triggering crashes the encoding process.

The record

CVE
CVE-2022-3965
Published
Nov 13, 2022
Updated
Aug 3, 2024
Vendor
FFmpeg
Product
FFmpeg
Classifications
CWE-119, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FFmpeg · FFmpegversion=n/a

Published CVSS scores

4.3UbuntuCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
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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