CVE-2026-17572

HDF5 SOHM List Index Heap Buffer Overflow

State: Published
Severity: 5.5 Medium
Published: Jul 27, 2026
Updated: Jul 27, 2026
Reserved: Jul 27, 2026

Description

Heap-based buffer overflow in the SOHM list-index deserialization code in HDF5 through 2.1.1 on all platforms allows attackers to cause a denial of service (crash) via a crafted HDF5 file whose shared-message list index declares a num_messages count exceeding list_max, triggering out-of-bounds heap reads and writes in H5SM__cache_list_deserialize and H5SM__cache_list_verify_chksum.

Scores

CVSS	Score	Vector	Source
4.0	5.5 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:H/SC:N/SI:L/SA:H/E:U	HDFG

Weaknesses

CWE-125 Out-of-bounds read
CWE-787 Out-of-bounds write

Affected Products

Product	Versions
HDF5The HDF Group	<= 2.1.1Affected

References

https://github.com/HDFGroup/hdf5/issues/6501

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