CVE-2025-2923Public exploit

Application crash via unchecked address encoding

Published Mar 28, 2025 · Updated Jun 23, 2026

Heap-based buffer overflow in HDF5 1.14.0 through 1.14.6 allows local users to crash applications by processing a crafted HDF5 file. H5F_addr_encode_len writes addr_len bytes through pp without checking the remaining heap-buffer boundary, so an eight-byte address can overrun the allocation by at least one byte. Exploitation requires local low-privilege access and file processing; the demonstrated consequence is a segmentation fault during post-processing.

CVSS severityUnavailable
Unscored
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Heap-based buffer overflow in HDF5 1.14.0 through 1.14.6 allows local users to crash applications by processing a crafted HDF5 file. H5F_addr_encode_len writes addr_len bytes through pp without checking the remaining heap-buffer boundary, so an eight-byte address can overrun the allocation by at least one byte. Exploitation requires local low-privilege access and file processing; the demonstrated consequence is a segmentation fault during post-processing.

The record

CVE
CVE-2025-2923
Published
Mar 28, 2025
Updated
Jun 23, 2026
Vendor
The HDF Group
Product
HDF5
Classifications
CWE-122, CWE-119, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

3.3VulDB CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
1.7VulDB CNAAV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR
3.3VulDB CNACVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
4.8VulDB CNACVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
T1499.004Application or System Exploitation

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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