CVE-2025-2308Public exploit

Local crash via unchecked scale-offset buffer index

Published Mar 14, 2025 · Updated May 8, 2025

Heap buffer over-read in HDF5 1.14.6 allows local users to crash applications that process a crafted scale-offset-filtered file. H5Z__scaleoffset_decompress_one_byte reads buffer[*j] without first checking j against the compressed buffer size, so decompression consumes one byte past the heap allocation. Reachability requires an application to process attacker-controlled HDF5 data; the public h5dump demonstration ends in an AddressSanitizer-detected crash.

CVSS severity7.8
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer over-read in HDF5 1.14.6 allows local users to crash applications that process a crafted scale-offset-filtered file. H5Z__scaleoffset_decompress_one_byte reads buffer[*j] without first checking j against the compressed buffer size, so decompression consumes one byte past the heap allocation. Reachability requires an application to process attacker-controlled HDF5 data; the public h5dump demonstration ends in an AddressSanitizer-detected crash.

The record

CVE
CVE-2025-2308
Published
Mar 14, 2025
Updated
May 8, 2025
Vendor
The HDF Group
Product
HDF5
Classifications
CWE-787, CWE-119, CWE-122, T1203
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 14, 2025CVE publishedPublication date reported by the CVE source.
  2. May 8, 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=1.14.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The HDF Group · HDF5version=1.14.6

Published CVSS scores

4.3VulDBAV:L/AC:L/Au:S/C:P/I:P/A:P
4.8VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-122Heap-based Buffer Overflow
T1203Exploitation for Client Execution

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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