Is there a public PoC exploit available for CVE-2025-6857?

Yes, a public proof-of-concept exploit is available for CVE-2025-6857. Prioritise patching immediately. EPSS: 0.0%.

Is there a patch available for CVE-2025-6857?

Yes, a patch is available for CVE-2025-6857. Update the affected software to the latest version immediately.

HDF5 CVE-2025-6857

Q: What is the CVSS score of CVE-2025-6857?

CVE-2025-6857 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-2025-19480 LOW

Buffer Overflow (CWE-119)

2025-06-29 cna@vuldb.com

Buffer Overflow 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 access, low complexity, low privileges, no interaction, availability impact only.

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 - 01:15 euvd

EUVD-2025-19480

Analysis Generated

Mar 16, 2026 - 01:15 vuln.today

PoC Detected

Jul 08, 2025 - 14:39 vuln.today

Public exploit code

CVE Published

Jun 29, 2025 - 10:15 cve.org

LOW 1.9

CVE Published

Jun 29, 2025 - 10:15 nvd

LOW 3.3

DescriptionCVE.org

A vulnerability has been found in HDF5 1.14.6 and classified as problematic. Affected by this vulnerability is the function H5G__node_cmp3 of the file src/H5Gnode.c. The manipulation leads to stack-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used.

AnalysisAI

Stack-based buffer overflow in HDF5 1.14.6 allows local attackers with low privileges to cause denial of service by triggering a crash in the H5G__node_cmp3 function. A public exploit is available, but exploitation requires local access, limiting widespread impact. The vulnerability is rated low severity (CVSS 1.9) and has a very low EPSS exploitation probability (0.04%), despite a publicly available proof-of-concept.

Technical ContextAI

HDF5 is a high-performance data management and storage suite widely used in scientific and industrial applications for managing large, complex datasets. The vulnerability resides in the H5G__node_cmp3 function within src/H5Gnode.c, which handles group node comparison during HDF5 file operations. CPE data confirms only HDF5 version 1.14.6 is affected. The root cause is a stack-based buffer overflow (CWE-119), where crafted input data can overflow a stack buffer, potentially corrupting memory and causing a crash or code execution in localized scenarios.

RemediationAI

Upgrade to a patched version of HDF5 beyond 1.14.6. The vendor has provided a fix, referenced in the GitHub issue (https://github.com/HDFGroup/hdf5/issues/5575). Apply the latest stable release or vendor-recommended patch. Since this is a local vulnerability, restrict access to HDF5 libraries and tools to trusted users only. As a compensating control, monitor systems for unexpected crashes of HDF5 processes, which may indicate exploitation attempts.