CVE-2022-47657Public exploit

Application crash via unchecked HEVC layer index

Published Jan 5, 2023 · Updated Apr 10, 2025

Buffer overflow in GPAC MP4Box 2.1-DEV-rev644-g5c4df2a67 allows attackers to crash the application via a crafted HEVC file. hevc_parse_vps_extension uses a layer_id_in_nuh value from the video parameter set to index the four-entry layer_id_in_vps array without first enforcing MAX_LHVC_LAYERS. A user must make MP4Box import the crafted file; the public proof of concept demonstrates an out-of-bounds access and sanitizer-detected crash, not code execution.

CVSS severity7.8
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in GPAC MP4Box 2.1-DEV-rev644-g5c4df2a67 allows attackers to crash the application via a crafted HEVC file. hevc_parse_vps_extension uses a layer_id_in_nuh value from the video parameter set to index the four-entry layer_id_in_vps array without first enforcing MAX_LHVC_LAYERS. A user must make MP4Box import the crafted file; the public proof of concept demonstrates an out-of-bounds access and sanitizer-detected crash, not code execution.

The record

CVE
CVE-2022-47657
Published
Jan 5, 2023
Updated
Apr 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/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 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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1204.002Malicious File

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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