CVE-2024-33873Network attack vector

Process crash or code execution via heap overwrite

Published May 9, 2024 · Updated Feb 13, 2025

Heap buffer overflow in HDF5 1.14.3 and earlier allows attackers to crash a process or execute code via a crafted HDF5 file. H5D__scatter_mem writes scattered dataset elements beyond a heap destination buffer; published records do not identify the missing size check. Exploitation requires attacker-controlled file data to reach the affected dataset-scattering path, where memory corruption can terminate or compromise the consuming process.

CVSS severity8.8
High
EPSS probability0.91%
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 1.14.3 and earlier allows attackers to crash a process or execute code via a crafted HDF5 file. H5D__scatter_mem writes scattered dataset elements beyond a heap destination buffer; published records do not identify the missing size check. Exploitation requires attacker-controlled file data to reach the affected dataset-scattering path, where memory corruption can terminate or compromise the consuming process.

The record

CVE
CVE-2024-33873
Published
May 9, 2024
Updated
Feb 13, 2025
Vendor
The HDF Group
Product
HDF5
Classifications
CWE-122
Attack vector
network
Privileges
authenticated

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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.14.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The HDF Group · HDF5version=0 <=1.14.3

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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.

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow

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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