Vulnerability-Lookup

GHSA-6384-WH38-R9PF

Vulnerability from github – Published: 2026-11-02 21:31 – Updated: 2026-11-02 21:31

Details

HDF5 through 2.2.0 contains an uncontrolled recursion vulnerability in H5B__iterate_helper() in src/H5B.c. When iterating a version 1 B-tree, the function does not verify that a child node’s level matches the expected level. That check is performed only in H5B__cache_deserialize() when a node is first loaded into the metadata cache. A crafted HDF5 file whose B-tree child pointer refers back to a node already in the cache, such as a node that points to itself, bypasses the check and causes unbounded recursion, leading to stack exhaustion and a crash. This can be triggered by calling H5Gget_info() or H5Gget_num_objs() on a group in the crafted file, which reaches H5B_iterate() through H5G__obj_info() and H5G__stab_count(). An attacker who can get a user or application to open a malicious file can cause a denial of service.

Severity

4.3 (Medium)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

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  "affected": [],
  "aliases": [
    "CVE-2026-120689"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-674"
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    "nvd_published_at": "2026-11-02T20:17:41Z",
    "severity": "MODERATE"
  },
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  "id": "GHSA-6384-wh38-r9pf",
  "modified": "2026-11-02T21:31:59Z",
  "published": "2026-11-02T21:31:59Z",
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120689"
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      "type": "WEB",
      "url": "https://github.com/HDFGroup/hdf5/issues/6403"
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  "schema_version": "1.4.0",
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      "type": "CVSS_V4"
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  ]
}

CVE-2026-120689 (GCVE-0-2026-120689)

Vulnerability from cvelistv5 – Published: 2026-11-02 19:39 – Updated: 2026-11-02 19:52

Title

Uncontrolled Recursion in HDF5 H5B__iterate_helper() via Crafted File

Summary

Severity

4.3 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-02 19:52 UTC

CWE

CWE-674 - Uncontrolled Recursion

Assigner

HDFG CNA under the redhat root

CNA scorecard C 72/100 over 18 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/HDFGroup/hdf5/issues/6403

Impacted products

1 product

Vendor	Product	Version
The HDF Group	HDF5	Affected: <2.3.0 (custom)

Credits

Gabe Sherman

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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