Stack-based Buffer Overflow in HDF5 Affected by HDFGroup
CVE-2025-6857

4.8MEDIUM

Key Information:

Vendor

HDFGroup

Status
Hdf5
Vendor
CVE Published:
29 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6857?

A stack-based buffer overflow vulnerability exists in the HDF5 library version 1.14.6, specifically within the H5G__node_cmp3 function in the src/H5Gnode.c file. This flaw can be exploited to execute arbitrary code from a local host environment. As the issue has become public knowledge, it poses significant risks for systems utilizing this version of HDF5, making immediate awareness and remediation essential.

Affected Version(s)

HDF5 1.14.6

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-6857 - Proof of Concept

References

https://vuldb.com/?id.314329
vdb-entrytechnical-description
https://vuldb.com/?ctiid.314329
signaturepermissions-required
https://vuldb.com/?submit.602529
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

JJLeo (VulDB User)
.
CVE-2025-6857 : Stack-based Buffer Overflow in HDF5 Affected by HDFGroup