Heap-Based Buffer Overflow in HDF5 Affected by H5O__chunk_protect Function
CVE-2025-6818

4.8MEDIUM

Key Information:

Vendor

HDFGroup

Status
Hdf5
Vendor
CVE Published:
28 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6818?

A vulnerability has been identified in HDF5 version 1.14.6, specifically within the function H5O__chunk_protect located in /src/H5Ochunk.c. This issue allows for a heap-based buffer overflow, which can be exploited through local access. The disclosed exploit poses a risk, urging affected users to implement necessary security measures to mitigate potential attacks.

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-2025-6818 - Proof of Concept

References

https://vuldb.com/?id.314256
vdb-entrytechnical-description
https://vuldb.com/?ctiid.314256
signaturepermissions-required
https://vuldb.com/?submit.602326
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-2025-6818 : Heap-Based Buffer Overflow in HDF5 Affected by H5O__chunk_protect Function