CVE-2024-33875

Code execution via heap overflow in layout encoding

Published May 9, 2024 · Updated Feb 13, 2025

Heap buffer overflow in HDF5 Library 1.14.3 and earlier allows local users to crash a process through crafted HDF5 layout data. The H5O__layout_encode routine in H5Olayout.c writes malformed dataset layout data beyond its heap allocation during encoding. Local access to make the library process hostile HDF5 data is required; the resulting instruction-pointer corruption can terminate the process or enable code execution.

CVSS severity5.7
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

Heap buffer overflow in HDF5 Library 1.14.3 and earlier allows local users to crash a process through crafted HDF5 layout data. The H5O__layout_encode routine in H5Olayout.c writes malformed dataset layout data beyond its heap allocation during encoding. Local access to make the library process hostile HDF5 data is required; the resulting instruction-pointer corruption can terminate the process or enable code execution.

The record

CVE
CVE-2024-33875
Published
May 9, 2024
Updated
Feb 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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

5.7CISA-ADPCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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