HDF5 up to 1.14.6 /hdf5/src/H5Fint.c H5F_addr_decode_len heap-based overflow

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.0$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in HDF5 up to 1.14.6. This issue affects the function H5F_addr_decode_len of the file /hdf5/src/H5Fint.c. Executing a manipulation can lead to heap-based overflow. This vulnerability is handled as CVE-2025-6516. It is possible to launch the attack on the local host. Additionally, an exploit exists.

Detailsinfo

A vulnerability has been found in HDF5 up to 1.14.6 and classified as critical. This vulnerability affects the function H5F_addr_decode_len of the file /hdf5/src/H5Fint.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-6516. The exploitation appears to be easy. The attack needs to be approached locally. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at EUVD (EUVD-2025-18903) and CERT Bund (WID-SEC-2025-2907). Once again VulDB remains the best source for vulnerability data.

Affected

  • Red Hat Enterprise Linux

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CNA Base Score: 5.3
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/23/2025 Advisory disclosed
06/23/2025 +0 days VulDB entry created
12/22/2025 +182 days VulDB entry last update

Sourcesinfo

Advisory: 5581
Status: Not defined

CVE: CVE-2025-6516 (🔒)
GCVE (CVE): GCVE-0-2025-6516
GCVE (VulDB): GCVE-100-313636
EUVD: 🔒
CERT Bund: WID-SEC-2025-2907 - Red Hat Enterprise Linux AI (HDF5 ): Mehrere Schwachstellen ermöglichen Manipulation von Dateien

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/23/2025 14:23
Updated: 12/22/2025 13:12
Changes: 06/23/2025 14:23 (56), 06/23/2025 20:50 (1), 06/26/2025 16:21 (41), 12/22/2025 13:12 (7)
Complete: 🔍
Submitter: Rulkallos
Cache ID: 216:C63:103

Submitinfo

Accepted

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!