Which versions of HDF5 are affected by CVE-2025-6817?

CVE-2025-6817 is a low-severity vulnerability involving resource exhaustion (CVSS 3.3).. A patch is available.

Is there a public PoC exploit available for CVE-2025-6817?

Yes, a public proof-of-concept exploit is available for CVE-2025-6817. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2025-6817?

During next maintenance window: Apply vendor patches when convenient. Verify denial of service controls are in place.

HDF5 CVE-2025-6817

Q: What is the CVSS score of CVE-2025-6817?

CVE-2025-6817 has a CVSS 4.0 base score of 1.9 (Low). CVSS vector: CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2025-19450 LOW

Uncontrolled Resource Consumption (CWE-400)

2025-06-28 cna@vuldb.com

Denial Of Service Hdf5

1.9

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

1.9 LOW

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

vuln.today AI

3.3 LOW

Local attack with low privileges; no special complexity; only availability impacted to a low degree.

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

4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Ubuntu

LOW

qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

CVSS changed

Apr 29, 2026 - 01:11 NVD

3.3 (LOW) 1.9 (LOW)

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

EUVD ID Assigned

Mar 16, 2026 - 01:05 euvd

EUVD-2025-19450

Analysis Generated

Mar 16, 2026 - 01:05 vuln.today

PoC Detected

Jul 01, 2025 - 17:30 vuln.today

Public exploit code

CVE Published

Jun 28, 2025 - 12:15 cve.org

LOW 1.9

CVE Published

Jun 28, 2025 - 12:15 nvd

LOW 3.3

DescriptionCVE.org

A vulnerability, which was classified as problematic, has been found in HDF5 1.14.6. This issue affects the function H5C__load_entry of the file /src/H5Centry.c. The manipulation leads to resource consumption. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used.

AnalysisAI

Local denial-of-service via resource consumption in HDF5 1.14.6 allows a low-privileged attacker to cause application unresponsiveness by exploiting a flaw in the H5C__load_entry metadata cache function. Public exploit code exists, but no active exploitation has been confirmed by CISA KEV, and EPSS indicates a very low exploitation probability (0.05%).

Technical ContextAI

HDF5 is a hierarchical data format library used for storing and managing large amounts of numerical data, commonly in scientific and engineering applications. The vulnerability resides in the internal function H5C__load_entry within H5Centry.c, which handles metadata cache loading. It is classified under CWE-400 (Uncontrolled Resource Consumption). According to the provided CPE, the specific affected product is HDF5 version 1.14.6 from The HDF Group.

RemediationAI

Upgrade to the latest patched version of HDF5; the vendor's fix is referenced in GitHub issue #5572. If an immediate upgrade is not feasible, restrict local access to trusted users only and avoid processing untrusted HDF5 files on systems where untrusted users may have low-privileged access. Disabling the HDF5 processing feature for non-essential applications can also mitigate the risk, though this may disrupt legitimate data analysis workflows.