🛡️ CVE-2025-2309 — hdf5

🟡 CVSS 5.3 — Medium ⚠️ Exploit Public CWE-119 NVD

5.3

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

A vulnerability has been found in HDF5 1.14.6 and classified as critical. This vulnerability affects the function H5T__bit_copy of the component Type Conversion Logic. The manipulation leads to heap-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The vendor plans to fix this issue in an upcoming release.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability low.

Weakness class

CVE-2025-2309 is classified as CWE-119: Improper Restriction of Operations within Memory Buffer Bounds. A read or write is performed without confirming it stays inside the allocated buffer, corrupting adjacent memory.

Affected software

CVE-2025-2309 is recorded against 1 package.

hdf5

Timeline and source

Published on 14 March 2025 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

github.com
vuldb.com
vuldb.com
vuldb.com

CVE-2025-2309 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Debian Ubuntu

Details

Severity MEDIUM

CVSS Score 5.3

CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CWE CWE-119

Public Exploit ⚠️ Yes

Source NVD

Published 2025-03-14

Updated 2026-08-20

Modified 2026-06-17

Fix URL N/A

Affected Packages

Software	From version	Fixed in
hdf5	—	—

References

Exploit, Third Party Advisory https://github.com/madao123123/crash_report/blob/main/hdf5_poc/hdf5_poc3.md

Permissions Required, VDB Entry https://vuldb.com/?ctiid.299722

Third Party Advisory, VDB Entry https://vuldb.com/?id.299722

Third Party Advisory, VDB Entry https://vuldb.com/?submit.514532

🔗 NVD 🔗 Mitre

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Exploit Protection

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CVE-2025-2309 carries CVSS 5.3 Medium rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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