Bug 2457327 (CVE-2026-29043)

Summary: CVE-2026-29043 HDF5: HDF5: Remote code execution and denial of service via heap buffer overflow in H5T__ref_mem_setnull
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bbrownin, jmitchel, kshier, pbohmill, teagle
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 a specially crafted HDF5 (.h5) file can trigger a write-based heap buffer overflow in the H5T__ref_mem_setnull method when the file is parsed. This vulnerability can lead to a denial-of-service condition, and potentially allow for remote code execution depending on the exploitability of the heap overflow against modern operating systems.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-04-10 16:02:37 UTC 
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.