CVE-2026-29043: CWE-122: Heap-based Buffer Overflow in HDFGroup hdf5
HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.
AI Analysis
Technical Summary
HDF5 versions up to 1.14.1-2 contain a heap-based buffer overflow vulnerability (CWE-122) in the H5T__ref_mem_setnull function. An attacker controlling an h5 file parsed by HDF5 can trigger a write-based overflow on the heap. This vulnerability can cause denial-of-service and potentially more severe impacts such as remote code execution depending on exploit conditions. The CVSS 3.1 vector indicates local attack vector, low complexity, no privileges required, user interaction required, unchanged scope, and impact limited to availability.
Potential Impact
The vulnerability can lead to denial-of-service by crashing the application processing the malicious h5 file. There is also a potential for remote code execution if the heap overflow can be exploited effectively on the target system. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted or unauthenticated h5 files to mitigate risk.
CVE-2026-29043: CWE-122: Heap-based Buffer Overflow in HDFGroup hdf5
Description
HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
HDF5 versions up to 1.14.1-2 contain a heap-based buffer overflow vulnerability (CWE-122) in the H5T__ref_mem_setnull function. An attacker controlling an h5 file parsed by HDF5 can trigger a write-based overflow on the heap. This vulnerability can cause denial-of-service and potentially more severe impacts such as remote code execution depending on exploit conditions. The CVSS 3.1 vector indicates local attack vector, low complexity, no privileges required, user interaction required, unchanged scope, and impact limited to availability.
Potential Impact
The vulnerability can lead to denial-of-service by crashing the application processing the malicious h5 file. There is also a potential for remote code execution if the heap overflow can be exploited effectively on the target system. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted or unauthenticated h5 files to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-03T17:50:11.242Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d91fde1cc7ad14dacba271
Added to database: 4/10/2026, 4:05:50 PM
Last enriched: 4/18/2026, 2:20:19 PM
Last updated: 5/26/2026, 1:36:51 PM
Views: 99
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