CVE-2022-48434Public exploitNetwork attack vector

Arbitrary code execution via stale hardware context

Published Mar 29, 2023 · Updated Oct 21, 2024

Use-after-free in FFmpeg libavcodec before 5.1.2 allows remote attackers to execute arbitrary code via a crafted H.264 video. During multithreaded Direct3D11 decoding, a mid-video SPS change frees and replaces the hardware context but leaves the main thread holding the stale address, which is freed again when decoding closes. Triggering requires hardware reinitialization during parallel video decoding; successful heap grooming executes code with the consuming process's privileges.

CVSS severity8.1
High
EPSS probability1.51%
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 libavcodec before 5.1.2 allows remote attackers to execute arbitrary code via a crafted H.264 video. During multithreaded Direct3D11 decoding, a mid-video SPS change frees and replaces the hardware context but leaves the main thread holding the stale address, which is freed again when decoding closes. Triggering requires hardware reinitialization during parallel video decoding; successful heap grooming executes code with the consuming process's privileges.

The record

CVE
CVE-2022-48434
Published
Mar 29, 2023
Updated
Oct 21, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 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

8.1NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/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 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 exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
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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