What is the CVSS score of CVE-2023-52339?

CVE-2023-52339 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.3%.

Which versions of Libebml are affected by CVE-2023-52339?

Organizations using libebml should be aware of notable risk from CVE-2023-52339, a integer overflow vulnerability rated CVSS 6.5. Exploitation could cause memory corruption or application crashes.. A patch is available.

Is there a public PoC exploit available for CVE-2023-52339?

Yes, a public proof-of-concept exploit is available for CVE-2023-52339. Prioritise patching immediately. EPSS: 0.3%.

How to fix or mitigate CVE-2023-52339?

Within 7 days: Identify affected systems running libebml and apply vendor patches promptly. Vendor patch is available.

Libebml CVE-2023-52339

MEDIUM

Integer Overflow or Wraparound (CWE-190)

2024-01-12 cve@mitre.org

Integer Overflow Buffer Overflow Libebml

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:34 vuln.today

Patch released

Mar 28, 2026 - 19:34 nvd

Patch available

PoC Detected

Nov 04, 2025 - 22:15 vuln.today

Public exploit code

CVE Published

Jan 12, 2024 - 02:15 nvd

MEDIUM 6.5

DescriptionCVE.org

In libebml before 1.4.5, an integer overflow in MemIOCallback.cpp can occur when reading or writing. It may result in buffer overflows.

AnalysisAI

In libebml before 1.4.5, an integer overflow in MemIOCallback.cpp can occur when reading or writing. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Integer Overflow (CWE-190), which allows attackers to cause unexpected behavior through arithmetic overflow. In libebml before 1.4.5, an integer overflow in MemIOCallback.cpp can occur when reading or writing. It may result in buffer overflows. Affected products include: Matroska Libebml. Version information: before 1.4.5.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate arithmetic operations, use safe integer libraries, check bounds before allocation.