CVE-2024-32623Network attack vector

Crash and code execution via array-fill overflow

Published May 9, 2024 · Updated Feb 13, 2025

Heap-based buffer overflow in The HDF Group HDF5 1.14.3 and earlier allows attackers to crash applications via crafted HDF5 data. During element selection, H5S_select_elements calls H5VM_array_fill, which writes beyond its allocated heap buffer while filling an array. Triggering requires an application to process attacker-controlled HDF5 data; resulting instruction-pointer corruption crashes the process or enables code execution in that application's context.

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-based buffer overflow in The HDF Group HDF5 1.14.3 and earlier allows attackers to crash applications via crafted HDF5 data. During element selection, H5S_select_elements calls H5VM_array_fill, which writes beyond its allocated heap buffer while filling an array. Triggering requires an application to process attacker-controlled HDF5 data; resulting instruction-pointer corruption crashes the process or enables code execution in that application's context.

The record

CVE
CVE-2024-32623
Published
May 9, 2024
Updated
Feb 13, 2025
Vendor
The HDF Group
Product
HDF5
Classifications
CWE-122, T1203
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.

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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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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