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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| The HDF Group | HDF5 | unaffected |
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Fixes
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References
| Link | Providers |
|---|---|
| https://github.com/HDFGroup/hdf5/issues/6501 |
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History
Mon, 27 Jul 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | HDF5 SOHM List Index Heap Buffer Overflow | |
| Weaknesses | CWE-125 CWE-787 |
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| Metrics |
cvssV4_0
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MITRE
Status: PUBLISHED
Assigner: HDFG
Published:
Updated: 2026-07-27T15:11:36.949Z
Reserved: 2026-07-27T15:07:05.659Z
Link: CVE-2026-17572
Vulnrichment
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