CVE-2026-17572
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability—
ProductHdfgroup Hdf5
PublishedJul 27, 2026
First seenJul 27, 2026
Weakness typeCWE-125Out-of-bounds readCWE-787Out-of-bounds write
How to fix
Update
- hdfgroup hdf52.2.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| hdfgroup hdf5 | v < 2.2.0 | 2.2.0 |
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