Null Pointer Dereference in HDF5 Software by HDF Group
CVE-2025-6858

4.8MEDIUM

Key Information:

Vendor

HDF Group

Status
Hdf5
Vendor
CVE Published:
29 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6858?

A vulnerability exists in the HDF5 software, specifically within the H5C__flush_single_entry function located in src/H5Centry.c. This issue leads to a null pointer dereference, which can potentially be exploited locally. The vulnerability has been publicly documented, raising concerns for users of the affected HDF5 version 1.14.6. Attackers exploiting this flaw may gain unauthorized access or cause system instability by manipulating this function.

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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-2025-6858 - Proof of Concept

References

https://vuldb.com/?id.314330
vdb-entrytechnical-description
https://vuldb.com/?ctiid.314330
signaturepermissions-required
https://vuldb.com/?submit.602530
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)
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