CVE-2025-6270Public exploit

Local crash via unchecked file-space page size

Published Jun 19, 2025 · Updated Jun 23, 2025

Heap-buffer overflow in HDF5 1.14.0 through 1.14.6 allows local users to crash a parsing process with a crafted HDF5 file. H5O__fsinfo_decode accepts a zero or oversized file-space page size, allowing H5FS__sect_find_node to remove an element from an empty or invalid skip list and read beyond its heap allocation. The file must be processed by an HDF5-linked application; the demonstrated consequence is a process crash, not proven code execution.

CVSS severity5.3
Medium
EPSS probability0.24%
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 1.14.0 through 1.14.6 allows local users to crash a parsing process with a crafted HDF5 file. H5O__fsinfo_decode accepts a zero or oversized file-space page size, allowing H5FS__sect_find_node to remove an element from an empty or invalid skip list and read beyond its heap allocation. The file must be processed by an HDF5-linked application; the demonstrated consequence is a process crash, not proven code execution.

The record

CVE
CVE-2025-6270
Published
Jun 19, 2025
Updated
Jun 23, 2025
Vendor
The HDF Group
Product
HDF5
Classifications
CWE-122, CWE-119
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 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=1.14.0
  2. Affected versionversion=1.14.1
  3. Affected versionversion=1.14.2
  4. Affected versionversion=1.14.3
  5. Affected versionversion=1.14.4
  6. Affected versionversion=1.14.5
  7. Affected versionversion=1.14.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The HDF Group · HDF5version=1.14.0; version=1.14.1; version=1.14.2; version=1.14.3; version=1.14.4; version=1.14.5; version=1.14.6

Published CVSS scores

5.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
4.3VulDBAV:L/AC:L/Au:S/C:P/I:P/A:P
1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

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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