Bug 2441088 (CVE-2026-26200)

Summary: CVE-2026-26200 hdf5: HDF5: Denial of Service due to heap buffer overflow when parsing a crafted h5 file
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: bbrownin, timothy.a.meader
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in HDF5, a software for managing data. An attacker who can control an `h5` file parsed by HDF5 can trigger a write-based heap buffer overflow. This can lead to a denial-of-service condition, and could potentially lead to further issues such as remote code execution, though its real-world exploitability for this is currently unknown.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2441201, 2441203, 2441202    
Bug Blocks:    

Description OSIDB Bzimport 2026-02-19 20:05:56 UTC
HDF5 is software for managing data. Prior to version 1.14.4-2, an attacker who can control an `h5` file parsed by HDF5 can trigger a write-based heap buffer overflow condition. 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. Real-world exploitability of this issue in terms of remote-code execution is currently unknown. Version 1.14.4-2 fixes the issue.