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CVE-2026-17572

HDF5 SOHM List Index Heap Buffer Overflow

MEDIUM
5.5
CVSS Score
Published: July 27, 2026 at 03:11 PM UTC
Updated: October 24, 2026 at 01:10 PM UTC
2 products affected across 2 vendorsHDF5HDF5

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

HDF5· Hdfgroup
95%
v < 2.2.0
Affected range stops below 2.2.0, so it looks safe — our inference, not a vendor statement
HDF5· Hdf
90%
<= 2.1.1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Issue Tracking
Source: cverecord
https://github.com/HDFGroup/hdf5/issues/6501

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMHDFG
Vector?

Quick Info

StatusANALYZED
CWE
CWE-125CWE-787

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