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5 vulnerabilities found for hdf5 by HDFGroup
CVE-2026-26199 (GCVE-0-2026-26199)
Vulnerability from cvelistv5 – Published: 2026-07-20 14:59 – Updated: 2026-07-20 18:56
VLAI
EPSS
VEX
Title
Buffer underflow in `H5Iget_name `/`H5G_get_name` if size is zero
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 18:56 UTC
CWE
- CWE-124 - Buffer Underwrite ('Buffer Underflow')
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/HDFGroup/hdf5/security/advisor… | x_refsource_CONFIRM |
| https://github.com/HDFGroup/hdf5/blob/develop/src… | x_refsource_MISC |
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CVE-2026-26197 (GCVE-0-2026-26197)
Vulnerability from cvelistv5 – Published: 2026-07-20 14:55 – Updated: 2026-07-20 15:34
VLAI
EPSS
VEX
Title
Array full size, element count, and element size are not checked to make sure they match in H5Odtype.c
Summary
HDF5 is a high-performance library and a file format specification that implements the HDF5 data model. If a file is corrupted such that an array datatype's size, the number of elements, and the element size are not in agreement it can trigger an out of bounds read. The array datatype stores the full size of the datatype (`dt->shared->size`) separately from the number of elements (`dt->shared->u.array.nelem`) and the element size (`dt->shared->parent->shared->size`). If any one of these are corrupted so that they don't align with the others (element size * nelem = full size), it can lead to an out of bounds read. Depending on what is corrupted, it can alter the type of out of bounds read triggered. The vulnerability is present only in files that have been maliciously altered, as its generally not possible to independently alter the full size of the datatype, the element count and the element size. As such, this is only present if a malicious actor is altering files, and won't appear in regular usage.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 15:32 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/HDFGroup/hdf5/security/advisor… | x_refsource_CONFIRM |
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CVE-2026-29043 (GCVE-0-2026-29043)
Vulnerability from cvelistv5 – Published: 2026-04-10 15:35 – Updated: 2026-04-14 14:50
VLAI
EPSS
VEX
Title
HDF5 H5T__ref_mem_setnull Heap Buffer Overflow
Summary
HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.
Severity
5.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-14 14:50 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/HDFGroup/hdf5/security/advisor… | x_refsource_CONFIRM |
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CVE-2026-34734 (GCVE-0-2026-34734)
Vulnerability from cvelistv5 – Published: 2026-04-09 19:01 – Updated: 2026-07-15 01:04
VLAI
EPSS
VEX
Title
HDF5: H5T__conv_struct Use After Free
Summary
HDF5 is software for managing data. In 1.14.1-2 and earlier, a heap-use-after-free was found in the h5dump helper utility. An attacker who can supply a malicious h5 file can trigger a heap use-after-free. The freed object is referenced in a memmove call from H5T__conv_struct. The original object was allocated by H5D__typeinfo_init_phase3 and freed by H5D__typeinfo_term.
Severity
7.8 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-13 20:47 UTC
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/HDFGroup/hdf5/security/advisor… | x_refsource_CONFIRM |
| https://access.redhat.com/security/cve/CVE-2026-34734 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2457034 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| HDFGroup | hdf5 |
Affected:
<= 1.14.1-2
|
|
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 |
cpe:/a:redhat:enterprise_linux_ai:3
|
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CVE-2026-26200 (GCVE-0-2026-26200)
Vulnerability from cvelistv5 – Published: 2026-02-19 19:19 – Updated: 2026-07-15 01:15
VLAI
EPSS
VEX
Title
HDF5 Affected by H5T__conv_struct_opt Heap Buffer Overflow
Summary
HDF5 is software for managing data. Prior to version 1.14.4-2, an attacker who can control an `h5` file parsed by HDF5 can trigger a write-based heap buffer overflow condition. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems. Real-world exploitability of this issue in terms of remote-code execution is currently unknown. Version 1.14.4-2 fixes the issue.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-19 21:16 UTC
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/HDFGroup/hdf5/security/advisor… | x_refsource_CONFIRM |
| https://access.redhat.com/security/cve/CVE-2026-26200 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2441088 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| HDFGroup | hdf5 |
Affected:
< 1.14.4-2
|
|
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 |
cpe:/a:redhat:enterprise_linux_ai:3
|
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