Medium
hdf5 — security advisory
HDF5 is a high-performance library and a file format specification that implements the HDF5 data model. If `H5Iget_name` is invoked on a group id with `0` for the size parameter, it will underflow when trying to place a null terminator in the buffer. This can occur if `H5Iget_name` is invoked in a way where `size` can be forced to zero, and there is important data before the `name` buffer.
- Products
- hdf5
- Affected versions
- 1.10.0-patch1+docs-4, 1.10.0-patch1+docs-4ubuntu0.1~esm1, 1.10.0-patch1+docs-4ubuntu0.1~esm2, 1.10.10+repack-3.1ubuntu3, 1.10.10+repack-3.1ubuntu4, 1.10.10+repack-3ubuntu1, 1.10.4+repack-10, 1.10.4+repack-11, 1.10.4+repack-11ubuntu1, 1.10.4+repack-11ubuntu1+esm1, 1.10.6+repack-5, 1.10.7+repack-4ubuntu1, 1.10.7+repack-4ubuntu2, 1.10.8+repack1-1ubuntu1, 1.14.5+repack-3build1, 1.14.5+repack-4, 1.14.6+repack-2, 1.8.11-3ubuntu1, 1.8.11-5ubuntu1, 1.8.11-5ubuntu2, 1.8.11-5ubuntu6, 1.8.11-5ubuntu7, 1.8.11-5ubuntu7.1, 1.8.11-5ubuntu7.1+esm1, 1.8.11-5ubuntu7.1+esm2, 1.8.15-patch1+docs-4, 1.8.15-patch1+docs-5, 1.8.16+docs-1, 1.8.16+docs-2, 1.8.16+docs-3, 1.8.16+docs-3ubuntu1, 1.8.16+docs-4, 1.8.16+docs-4ubuntu1, 1.8.16+docs-4ubuntu1.1, 1.8.16+docs-4ubuntu1.1+esm1, 1.8.16+docs-4ubuntu1.1+esm2, 2.2.0+repack-4, 2.2.0+repack-5
- Fixed versions
- Not specified
- CVEs
- CVE-2026-26199
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:56 UTC · Revision 1
Source evidence
HDF5 is a high-performance library and a file format specification that implements the HDF5 data model. If `H5Iget_name` is invoked on a group id with `0` for the size parameter, it will underflow when trying to place a null terminator in the buffer. This can occur if `H5Iget_name` is invoked in a way where `size` can be forced to zero, and there is important data before the `name` buffer.
osv:UBUNTU-CVE-2026-26199
hdf5
Fixed versions: Not specified
hdf5
Fixed versions: Not specified
hdf5
Fixed versions: Not specified
hdf5
Fixed versions: Not specified
hdf5
Fixed versions: Not specified
hdf5
Fixed versions: Not specified
hdf5
Fixed versions: Not specified
hdf5
Fixed versions: Not specified
Complete source record
{
"id": "5d36f02f7bed2e6a2622f819583fd5ae5352a88ce9e5c2915ccdc2e822f10e25",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-26199",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-26199",
"summary": "HDF5 is a high-performance library and a file format specification that implements the HDF5 data model. If `H5Iget_name` is invoked on a group id with `0` for the size parameter, it will underflow when trying to place a null terminator in the buffer. This can occur if `H5Iget_name` is invoked in a way where `size` can be forced to zero, and there is important data before the `name` buffer.",
"evidence": "osv:UBUNTU-CVE-2026-26199",
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{
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"evidence": "/affected/5/versions"
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"severity": "medium",
"structured": {
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"aliases": [
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"modified": "2026-10-17T12:56:18.139805842Z",
"provider": "osv",
"upstream": [
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],
"references": [
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"https://www.cve.org/CVERecord?id=CVE-2026-26199"
]
},
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"evidence": "/upstream"
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],
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},
"source_id": "core-osv",
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"published_at": "2026-07-20T16:16:00+00:00"
}