CVE-2023-33716Public exploit

Application interruption via unreleased byte-property allocation

Published Jun 1, 2023 · Updated Jan 9, 2025

Memory leak in mp4v2 2.1.3 allows context-dependent attackers to interrupt applications through a crafted MP4 file. During malformed descriptor parsing, MP4BytesProperty allocates a three-byte buffer that remains unreleased after parsing fails; the CVE description instead names MP4StringProperty. Exploitation requires a user or consuming application to open the file, and repeated processing can exhaust memory and interrupt the process.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in mp4v2 2.1.3 allows context-dependent attackers to interrupt applications through a crafted MP4 file. During malformed descriptor parsing, MP4BytesProperty allocates a three-byte buffer that remains unreleased after parsing fails; the CVE description instead names MP4StringProperty. Exploitation requires a user or consuming application to open the file, and repeated processing can exhaust memory and interrupt the process.

The record

CVE
CVE-2023-33716
Published
Jun 1, 2023
Updated
Jan 9, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-401, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 9, 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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
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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