Vulnerability-Lookup

CNVD-2026-40138

Vulnerability from cnvd - Published: 2026-10-12

Title

HDF5越界读取漏洞

Description

HDF5是一个支持海量数据存储与管理的文件格式库。 HDF5存在越界读取漏洞，该漏洞源于未能正确验证文件损坏时数组数据类型完整大小、元素数量与元素大小的一致性，攻击者可利用该漏洞通过篡改文件引发越界读取，导致信息泄露。

Severity

高

Patch Name

HDF5越界读取漏洞的补丁

Patch Description

HDF5是一个支持海量数据存储与管理的文件格式库。 HDF5存在越界读取漏洞，该漏洞源于未能正确验证文件损坏时数组数据类型完整大小、元素数量与元素大小的一致性，攻击者可利用该漏洞通过篡改文件引发越界读取，导致信息泄露。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级程序修复该安全问题，详情见厂商官网: https://github.com/HDFGroup/hdf5/security/advisories/GHSA-gh44-7wpq-622f

Reference

https://nvd.nist.gov/vuln/detail/cve-2026-26197

Impacted products

Name
HDF5 HDF5 <2.0.0

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-26197",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-26197"
    }
  },
  "description": "HDF5\u662f\u4e00\u4e2a\u652f\u6301\u6d77\u91cf\u6570\u636e\u5b58\u50a8\u4e0e\u7ba1\u7406\u7684\u6587\u4ef6\u683c\u5f0f\u5e93\u3002\n\nHDF5\u5b58\u5728\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u672a\u80fd\u6b63\u786e\u9a8c\u8bc1\u6587\u4ef6\u635f\u574f\u65f6\u6570\u7ec4\u6570\u636e\u7c7b\u578b\u5b8c\u6574\u5927\u5c0f\u3001\u5143\u7d20\u6570\u91cf\u4e0e\u5143\u7d20\u5927\u5c0f\u7684\u4e00\u81f4\u6027\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u7be1\u6539\u6587\u4ef6\u5f15\u53d1\u8d8a\u754c\u8bfb\u53d6\uff0c\u5bfc\u81f4\u4fe1\u606f\u6cc4\u9732\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u7a0b\u5e8f\u4fee\u590d\u8be5\u5b89\u5168\u95ee\u9898\uff0c\u8be6\u60c5\u89c1\u5382\u5546\u5b98\u7f51:\r\nhttps://github.com/HDFGroup/hdf5/security/advisories/GHSA-gh44-7wpq-622f",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-40138",
  "openTime": "2026-10-12",
  "patchDescription": "HDF5\u662f\u4e00\u4e2a\u652f\u6301\u6d77\u91cf\u6570\u636e\u5b58\u50a8\u4e0e\u7ba1\u7406\u7684\u6587\u4ef6\u683c\u5f0f\u5e93\u3002\r\n\r\nHDF5\u5b58\u5728\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u672a\u80fd\u6b63\u786e\u9a8c\u8bc1\u6587\u4ef6\u635f\u574f\u65f6\u6570\u7ec4\u6570\u636e\u7c7b\u578b\u5b8c\u6574\u5927\u5c0f\u3001\u5143\u7d20\u6570\u91cf\u4e0e\u5143\u7d20\u5927\u5c0f\u7684\u4e00\u81f4\u6027\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u7be1\u6539\u6587\u4ef6\u5f15\u53d1\u8d8a\u754c\u8bfb\u53d6\uff0c\u5bfc\u81f4\u4fe1\u606f\u6cc4\u9732\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "HDF5\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "HDF5 HDF5 \u003c2.0.0"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/cve-2026-26197",
  "serverity": "\u9ad8",
  "submitTime": "2026-07-24",
  "title": "HDF5\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e"
}

CVE-2026-26197 (GCVE-0-2026-26197)

Vulnerability from cvelistv5 – Published: 2026-07-20 14:55 – Updated: 2026-07-20 15:34

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

5.9 (Medium)


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

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 under the mitre root

CNA scorecard C 72/100 over 7634 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/HDFGroup/hdf5/security/advisor…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
HDFGroup	hdf5	Affected: < 2.0.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-26197",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-20T15:32:48.424585Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-20T15:34:11.301Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/HDFGroup/hdf5/security/advisories/GHSA-gh44-7wpq-622f"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "hdf5",
          "vendor": "HDFGroup",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.0.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s 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-\u003eshared-\u003esize`) separately from the number of elements (`dt-\u003eshared-\u003eu.array.nelem`) and the element size (`dt-\u003eshared-\u003eparent-\u003eshared-\u003esize`). If any one of these are corrupted so that they don\u0027t 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\u0027t appear in regular usage."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-20T14:55:50.636Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/HDFGroup/hdf5/security/advisories/GHSA-gh44-7wpq-622f",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/HDFGroup/hdf5/security/advisories/GHSA-gh44-7wpq-622f"
        }
      ],
      "source": {
        "advisory": "GHSA-gh44-7wpq-622f",
        "discovery": "UNKNOWN"
      },
      "title": "Array full size, element count, and element size are not checked to make sure they match in H5Odtype.c"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-26197",
    "datePublished": "2026-07-20T14:55:50.636Z",
    "dateReserved": "2026-02-11T19:56:24.813Z",
    "dateUpdated": "2026-07-20T15:34:11.301Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Vulnerability timeline

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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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