CVE-2014-125020

Memory corruption via stale H.264 bit contexts

Published Jun 19, 2022 · Updated Apr 15, 2025

Use-after-free in FFmpeg 2.0 H.264 decoding allows attackers to corrupt memory via crafted partitioned video data. The decoder carries data_partitioning state between decode calls, causing GetBitContext objects to reference data freed after an earlier packet. Exploitation requires affected H.264 input to traverse multiple decode calls; the invalid access can crash or corrupt the decoding process.

CVSS severity7.8
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in FFmpeg 2.0 H.264 decoding allows attackers to corrupt memory via crafted partitioned video data. The decoder carries data_partitioning state between decode calls, causing GetBitContext objects to reference data freed after an earlier packet. Exploitation requires affected H.264 input to traverse multiple decode calls; the invalid access can crash or corrupt the decoding process.

The record

CVE
CVE-2014-125020
Published
Jun 19, 2022
Updated
Apr 15, 2025
Vendor
FFmpeg
Product
FFmpeg
Classifications
CWE-119, CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record 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=2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

FFmpeg · FFmpegversion=2.0

Published CVSS scores

6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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