Bug 2515360

Summary:	CVE-2026-19024 hdf5: HDF5: Denial of service via malformed dataset [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Joel Chamberlain <jochambe>
Component:	hdf5	Assignee:	Orion Poplawski <orion>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	igor.raits, orion, sagitterghostproton.me, scitech-bugs
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["df5cb8de-0365-47a0-837e-8938a6ce297e"]}
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2511845

Description Joel Chamberlain 2026-08-13 15:07:05 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

NULL pointer dereference in H5Pget_fill_value in HDF5 before 2.1.1 allows attackers to cause a denial of service via a dataset whose version 1 or 2 fill value message has the "defined" flag set together with a negative size field, which is not normalized to the library's "undefined" sentinel and reaches H5T_path_find with a NULL datatype.