CVE-2023-50120Public exploit

Application hang via infinite AV1 parsing loop

Published Jan 10, 2024 · Updated Jun 17, 2025

Infinite loop in MP4Box GPAC 2.3-DEV-rev636-gfbd7e13aa-master allows context-dependent attackers to hang MP4Box via a crafted MP4 file. The av1_uvlc function enters an infinite loop while parsing malformed AV1 configuration data from an av1C box after a bitstream overread. A user or application must process the file locally; exploitation consumes execution capacity without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Infinite loop in MP4Box GPAC 2.3-DEV-rev636-gfbd7e13aa-master allows context-dependent attackers to hang MP4Box via a crafted MP4 file. The av1_uvlc function enters an infinite loop while parsing malformed AV1 configuration data from an av1C box after a bitstream overread. A user or application must process the file locally; exploitation consumes execution capacity without reported data disclosure or modification.

The record

CVE
CVE-2023-50120
Published
Jan 10, 2024
Updated
Jun 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-835, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 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

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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-835Loop with Unreachable Exit Condition ('Infinite Loop')
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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