HDF5 is an open-source data model, file format, and supporting library designed to store and manage large, complex datasets.
Overview
HDF5 is an open-source data model, file format, and supporting library designed to store and manage large, complex datasets. It supports hierarchical structures and chunked storage, enabling efficient I/O for big data; recent memory-safety disclosures in the HDF5 library raise cybersecurity concerns for applications relying on it, as heap corruption, use-after-free, and heap-buffer overflow vulnerabilities could be exploited when processing crafted data.
Related Threat Clusters
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Critical Exploitation of Ruby on Rails Vulnerability CVE-2026-66066 Confirmed
Threat actors are actively exploiting CVE-2026-66066, a critical Ruby on Rails vulnerability known as KindaRails2Shell, which allows unauthenticated attackers to read arbitrary files from servers, potentially leading to…
5 articles · Updated August 31, 2026 -
OpenAI Launches GPT-5.4-Cyber Amidst Cybersecurity Arms Race
OpenAI has introduced GPT-5.4-Cyber, a specialized AI model for defensive cybersecurity, available only to vetted professionals through its Trusted Access for Cyber (TAC) program. This model is designed to facilitate…
1370 articles · Updated April 14, 2026 -
Multiple CVEs Identified in HDF5 Library Version 1.14.3
Three critical vulnerabilities have been identified in the HDF5 Library version 1.14.3, all related to heap-based buffer overflows. The vulnerabilities, CVE-2024-33877, CVE-2024-33873, and CVE-2024-32624, could lead to…
3 articles · Updated February 21, 2026 -
Multiple HDF5 Vulnerabilities Identified: CVE-2025-6856 and CVE-2025-2913
Two vulnerabilities in the HDF5 library have been identified, CVE-2025-6856 and CVE-2025-2913, both related to use-after-free issues in the H5FL.c file. These vulnerabilities could potentially affect systems utilizing…
2 articles · Updated December 16, 2025 -
Multiple Heap Buffer Overflow Vulnerabilities Found in HDF5 v1.14.6
Three vulnerabilities have been identified in HDF5 version 1.14.6, specifically CVE-2025-44904 and CVE-2025-44905, both of which involve heap buffer overflows in different functions. Additionally, CVE-2025-6818 relates…
3 articles · Updated December 16, 2025
Recent Intelligence Reports
- Critical Ruby on Rails Vulnerability in Attackers’ Crosshairs — Feeds.Feedburner · August 31, 2026
- Hugging Face Breach: AI Agent Security Lessons — Blog.Gitguardian · July 29, 2026
- Anatomy of a Frontier Lab Agent Intrusion: A Technical Timeline of the July 2026 Incident — Huggingface.Co · July 28, 2026
- CVE-2024-33877 HDF5 Library through 1.14.3 has a heap-based buffer overflow in H5T__conv_struct_opt in H5Tconv.c. — Api.Msrc.Microsoft · February 21, 2026
- CVE-2024-32624 HDF5 Library through 1.14.3 contains a heap-based buffer overflow in H5T__ref_mem_setnull in H5Tref.c (called from H5T__conv_ref in H5Tconv.c) resulting in the corruption of the instruction pointer. — Api.Msrc.Microsoft · February 21, 2026
- CVE-2025-6818 HDF5 H5Ochunk.c H5O__chunk_protect heap — Api.Msrc.Microsoft · December 16, 2025
- CVE-2025-2913 HDF5 H5FL.c H5FL__blk_gc_list use after free — Api.Msrc.Microsoft · December 16, 2025
- CVE-2025-44904 hdf5 v1.14.6 was discovered to contain a heap buffer overflow via the H5VM_memcpyvv function. — Api.Msrc.Microsoft · December 16, 2025