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Affected Vendors & Products
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Workaround
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Tue, 03 Nov 2026 18:30:00 +0000
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ssvc
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Tue, 03 Nov 2026 17:00:00 +0000
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Hdfgroup
Hdfgroup hdf5 |
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| Vendors & Products |
Hdfgroup
Hdfgroup hdf5 |
Tue, 03 Nov 2026 15:45:00 +0000
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| Description | HDF5 through 2.2.0 contains a heap buffer over-read vulnerability in H5O__chunk_deserialize() in src/H5Ocache.c. When decoding object header messages, the declared message size is checked against the end of the chunk image before the remainder of the message header (flags, and for version 2 object headers, the optional creation index) has been decoded. Because the message body begins after these fields, a message can start up to four bytes further into the chunk than the size check accounts for. A crafted HDF5 file can declare a message size that passes the check but extends past the end of the chunk image, causing the message’s decode callback, for example H5O__mtime_new_decode() in src/H5Omtime.c, to read beyond the heap allocation. The flaw is reachable during H5Fopen() on a crafted file. An attacker who can get a user or application to open a malicious file can cause a denial of service or limited disclosure of process memory. | |
| Title | Heap Buffer Over-read via Malformed Message Size in HDF5's H5O__chunk_deserialize | |
| Weaknesses | CWE-125 | |
| References |
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| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: HDFG
Published:
Updated: 2026-11-03T17:55:20.773Z
Reserved: 2026-11-02T21:30:11.241Z
Link: CVE-2026-120756
Updated: 2026-11-03T17:55:14.314Z
Status : Awaiting Analysis
Published: 2026-11-03T16:17:22.940
Modified: 2026-11-03T18:17:56.657
Link: CVE-2026-120756
No data.
OpenCVE Enrichment
Updated: 2026-11-03T16:45:14Z