Heap-Based Buffer Overflow in HDF5 Affects Local Systems
CVE-2025-6516

4.8MEDIUM

Key Information:

Vendor

HDF Group

Status
Hdf5
Vendor
CVE Published:
23 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6516?

A vulnerability has been identified in HDF5 versions including and prior to 1.14.6, specifically within the H5F_addr_decode_len function located in /hdf5/src/H5Fint.c. This vulnerability permits a heap-based buffer overflow, which can potentially lead to unauthorized data access or corruption. While the exploit necessitates local access, it has been publicly disclosed and could be leveraged by malicious actors to compromise affected systems.

Affected Version(s)

HDF5 1.14.0

HDF5 1.14.1

HDF5 1.14.2

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-2025-6516 - Proof of Concept

References

https://vuldb.com/?id.313636
vdb-entrytechnical-description
https://vuldb.com/?ctiid.313636
signaturepermissions-required
https://vuldb.com/?submit.592589
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
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

Rulkallos (VulDB User)
.
CVE-2025-6516 : Heap-Based Buffer Overflow in HDF5 Affects Local Systems