Vulnerability-Lookup

OESA-2026-4459 (CVE-2026-19023)

Vulnerability from osv_openeuler – Published: 2026-10-22 14:35 – Updated: 2026-10-22 14:35 – Source website

Summary

hdf5 security update

Details

HDF5 is a data model, library, and file format for storing and managing data. It supports an unlimited variety of datatypes, and is designed for flexible and efficient I/O and for high volume and complex data. HDF5 is portable and is extensible, allowing applications to evolve in their use of HDF5. The HDF5 Technology suite includes tools and applications for managing, manipulating, viewing, and analyzing data in the HDF5 format.

Security Fix(es):

Untrusted pointer dereference in the render_bin_output function in the h5dump tool in HDF5 before 2.1.1 allows attackers to cause a denial of service via a variable-length string dataset with more than one element dumped in binary mode, which corrupts the per-element stride calculation and causes subsequent elements to be read from a misaligned offset and dereferenced as a pointer.(CVE-2026-19023)

NULL pointer dereference in H5Pget_fill_value in HDF5 before 2.1.1 allows attackers to cause a denial of service via a dataset whose version 1 or 2 fill value message has the "defined" flag set together with a negative size field, which is not normalized to the library's "undefined" sentinel and reaches H5T_path_find with a NULL datatype.(CVE-2026-19024)

H5Z__filter_nbit in H5Znbit.c in HDF5 through 2.3.0 dereferences cd_values[0] through cd_values[4] without validating that cd_values is non-NULL or that cd_nelmts is at least 5, the fixed size of the filter's header. This allows attackers to cause a denial of service via a crafted HDF5 file that stores the N-Bit filter pipeline message with zero client-data values, opened and read via H5Dread, e.g. by the h5ls or h5repack tools.(CVE-2026-19026)

The H5Z__nbit_decompress_one_byte, H5Z__nbit_decompress_one_nooptype, and H5Z__nbit_decompress_one_atomic functions in H5Znbit.c in HDF5 through 2.3.0 advance a read index into the compressed chunk buffer without bounding it against the buffer's actual size. This allows attackers to cause an out-of-bounds heap read, and in constrained cases disclosure of adjacent heap memory into decompressed dataset values, via a crafted HDF5 file whose N-Bit filter parameters describe more decompressed data than the stored compressed chunk actually contains, triggered via H5Dread, e.g. by the h5ls or h5repack tools.(CVE-2026-19027)

H5Z__filter_fletcher32 in H5Zfletcher32.c in HDF5 through 2.3.0 computes the data length to checksum by subtracting the 4-byte trailing checksum size from the input buffer size without checking that the buffer is at least 4 bytes, allowing a size_t underflow. This allows attackers to cause a denial of service (massively out-of-bounds read and application crash in H5_checksum_fletcher32) via a crafted HDF5 file with a Fletcher32-filtered chunk smaller than 4 bytes, triggered via H5Dread, e.g. by the h5ls or h5dump tools.(CVE-2026-19028)

Severity

8.2 (High)


                    
                      CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-19023	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-19024	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-19026	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-19027	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-19028	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "hdf5-1.14.5-8.oe2203sp4.aarch64.rpm",
          "hdf5-debuginfo-1.14.5-8.oe2203sp4.aarch64.rpm",
          "hdf5-debugsource-1.14.5-8.oe2203sp4.aarch64.rpm",
          "hdf5-devel-1.14.5-8.oe2203sp4.aarch64.rpm",
          "hdf5-mpich-1.14.5-8.oe2203sp4.aarch64.rpm",
          "hdf5-mpich-devel-1.14.5-8.oe2203sp4.aarch64.rpm",
          "hdf5-mpich-static-1.14.5-8.oe2203sp4.aarch64.rpm",
          "hdf5-openmpi-1.14.5-8.oe2203sp4.aarch64.rpm",
          "hdf5-openmpi-devel-1.14.5-8.oe2203sp4.aarch64.rpm",
          "hdf5-openmpi-static-1.14.5-8.oe2203sp4.aarch64.rpm"
        ],
        "src": [
          "hdf5-1.14.5-8.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "hdf5-1.14.5-8.oe2203sp4.x86_64.rpm",
          "hdf5-debuginfo-1.14.5-8.oe2203sp4.x86_64.rpm",
          "hdf5-debugsource-1.14.5-8.oe2203sp4.x86_64.rpm",
          "hdf5-devel-1.14.5-8.oe2203sp4.x86_64.rpm",
          "hdf5-mpich-1.14.5-8.oe2203sp4.x86_64.rpm",
          "hdf5-mpich-devel-1.14.5-8.oe2203sp4.x86_64.rpm",
          "hdf5-mpich-static-1.14.5-8.oe2203sp4.x86_64.rpm",
          "hdf5-openmpi-1.14.5-8.oe2203sp4.x86_64.rpm",
          "hdf5-openmpi-devel-1.14.5-8.oe2203sp4.x86_64.rpm",
          "hdf5-openmpi-static-1.14.5-8.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "hdf5",
        "purl": "pkg:rpm/openEuler/hdf5\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.14.5-8.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "HDF5 is a data model, library, and file format for storing and managing data. It supports an unlimited variety of datatypes, and is designed for flexible and efficient I/O and for high volume and complex data. HDF5 is portable and is extensible, allowing applications to evolve in their use of HDF5. The HDF5 Technology suite includes tools and applications for managing, manipulating, viewing, and analyzing data in the HDF5 format.\r\n\r\nSecurity Fix(es):\n\nUntrusted pointer dereference in the render_bin_output function in the h5dump tool in HDF5 before 2.1.1 allows attackers to cause a denial of service via a variable-length string dataset with more than one element dumped in binary mode, which corrupts the per-element stride calculation and causes subsequent elements to be read from a misaligned offset and dereferenced as a pointer.(CVE-2026-19023)\n\nNULL pointer dereference in H5Pget_fill_value in HDF5 before 2.1.1 allows attackers to cause a denial of service via a dataset whose version 1 or 2 fill value message has the \u0026quot;defined\u0026quot; flag set together with a negative size field, which is not normalized to the library\u0026apos;s \u0026quot;undefined\u0026quot; sentinel and reaches H5T_path_find with a NULL datatype.(CVE-2026-19024)\n\nH5Z__filter_nbit in H5Znbit.c in HDF5 through 2.3.0 dereferences cd_values[0] through cd_values[4] without validating that cd_values is non-NULL or that cd_nelmts is at least 5, the fixed size of the filter\u0026apos;s header. This allows attackers to cause a denial of service via a crafted HDF5 file that stores the N-Bit filter pipeline message with zero client-data values, opened and read via H5Dread, e.g. by the h5ls or h5repack tools.(CVE-2026-19026)\n\nThe H5Z__nbit_decompress_one_byte, H5Z__nbit_decompress_one_nooptype, and H5Z__nbit_decompress_one_atomic functions in H5Znbit.c in HDF5 through 2.3.0 advance a read index into the compressed chunk buffer without bounding it against the buffer\u0026apos;s actual size. This allows attackers to cause an out-of-bounds heap read, and in constrained cases disclosure of adjacent heap memory into decompressed dataset values, via a crafted HDF5 file whose N-Bit filter parameters describe more decompressed data than the stored compressed chunk actually contains, triggered via H5Dread, e.g. by the h5ls or h5repack tools.(CVE-2026-19027)\n\nH5Z__filter_fletcher32 in H5Zfletcher32.c in HDF5 through 2.3.0 computes the data length to checksum by subtracting the 4-byte trailing checksum size from the input buffer size without checking that the buffer is at least 4 bytes, allowing a size_t underflow. This allows attackers to cause a denial of service (massively out-of-bounds read and application crash in H5_checksum_fletcher32) via a crafted HDF5 file with a Fletcher32-filtered chunk smaller than 4 bytes, triggered via H5Dread, e.g. by the h5ls or h5dump tools.(CVE-2026-19028)",
  "id": "OESA-2026-4459",
  "modified": "2026-10-22T14:35:23Z",
  "published": "2026-10-22T14:35:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4459"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19023"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19024"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19026"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19027"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19028"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "hdf5 security update",
  "upstream": [
    "CVE-2026-19023",
    "CVE-2026-19024",
    "CVE-2026-19026",
    "CVE-2026-19027",
    "CVE-2026-19028"
  ]
}

CVE-2026-19023 (GCVE-0-2026-19023)

Vulnerability from cvelistv5 – Published: 2026-08-05 22:13 – Updated: 2026-08-06 15:30

Title

HDF5 h5dump Untrusted Pointer Dereference in Binary Output of Variable-Length String Datasets

Summary

Untrusted pointer dereference in the render_bin_output function in the h5dump tool in HDF5 before 2.3.0 allows attackers to cause a denial of service via a variable-length string dataset with more than one element dumped in binary mode, which corrupts the per-element stride calculation and causes subsequent elements to be read from a misaligned offset and dereferenced as a pointer.

Severity

6.8 (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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-06 13:31 UTC

CWE

CWE-822 - Untrusted pointer dereference

Assigner

HDFG CNA under the redhat root

CNA scorecard C 71/100 over 12 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/HDFGroup/hdf5/issues/6486

Impacted products

1 product

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

Show details on NVD website

JSON

To clipboard

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CVE-2026-19024 (GCVE-0-2026-19024)

Vulnerability from cvelistv5 – Published: 2026-08-05 22:14 – Updated: 2026-08-06 15:30

Title

HDF5 H5Pget_fill_value NULL Pointer Dereference via Malformed Fill Value Message

Summary

NULL pointer dereference in H5Pget_fill_value in HDF5 before 2.3.0 allows attackers to cause a denial of service via a dataset whose version 1 or 2 fill value message has the "defined" flag set together with a negative size field, which is not normalized to the library's "undefined" sentinel and reaches H5T_path_find with a NULL datatype.

Severity

8.2 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-06 14:36 UTC

CWE

CWE-476 - NULL pointer dereference

Assigner

HDFG CNA under the redhat root

CNA scorecard C 71/100 over 12 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/HDFGroup/hdf5/issues/6487

Impacted products

1 product

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

Show details on NVD website

JSON

To clipboard

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CVE-2026-19026 (GCVE-0-2026-19026)

Vulnerability from cvelistv5 – Published: 2026-08-05 22:47 – Updated: 2026-10-06 20:32

Title

Nbit filter NULL/short parameter-array dereference

Summary

H5Z__filter_nbit in H5Znbit.c in HDF5 prior to 2.3.0 dereferences cd_values[0] through cd_values[4] without validating that cd_values is non-NULL or that cd_nelmts is at least 5, the fixed size of the filter's header. This allows attackers to cause a denial of service via a crafted HDF5 file that stores the N-Bit filter pipeline message with zero client-data values, opened and read via H5Dread, e.g. by the h5ls or h5repack tools.

Severity

6.8 (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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-06 14:31 UTC

CWE

CWE-476 - NULL pointer dereference
CWE-1284 - Improper validation of specified quantity in input

Assigner

HDFG CNA under the redhat root

CNA scorecard C 71/100 over 12 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/HDFGroup/hdf5/pull/6497
https://github.com/HDFGroup/hdf5/issues/6489
https://github.com/HDFGroup/hdf5/issues/6492

Impacted products

1 product

Vendor	Product	Version
The HDF Group	HDF5	Affected: <=2.3.0

Show details on NVD website

JSON

To clipboard

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CVE-2026-19027 (GCVE-0-2026-19027)

Vulnerability from cvelistv5 – Published: 2026-08-05 23:12 – Updated: 2026-10-06 20:33

Title

HDF5 out-of-bounds heap read in N-Bit filter decompression

Summary

The H5Z__nbit_decompress_one_byte, H5Z__nbit_decompress_one_nooptype, and H5Z__nbit_decompress_one_atomic functions in H5Znbit.c in HDF5 prior to 2.3.0 advance a read index into the compressed chunk buffer without bounding it against the buffer's actual size. This allows attackers to cause an out-of-bounds heap read, and in constrained cases disclosure of adjacent heap memory into decompressed dataset values, via a crafted HDF5 file whose N-Bit filter parameters describe more decompressed data than the stored compressed chunk actually contains, triggered via H5Dread, e.g. by the h5ls or h5repack tools.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/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 2026-08-06 14:29 UTC

CWE

CWE-125 - Out-of-bounds read

Assigner

HDFG CNA under the redhat root

CNA scorecard C 71/100 over 12 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/HDFGroup/hdf5/pull/6497
https://github.com/HDFGroup/hdf5/issues/6489
https://github.com/HDFGroup/hdf5/issues/6492

Impacted products

1 product

Vendor	Product	Version
The HDF Group	HDF5	Affected: <=2.3.0

Show details on NVD website

JSON

To clipboard

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CVE-2026-19028 (GCVE-0-2026-19028)

Vulnerability from cvelistv5 – Published: 2026-08-05 23:15 – Updated: 2026-10-06 20:32

Title

HDF5 integer underflow in Fletcher32 filter leads to massive out-of-bounds read

Summary

H5Z__filter_fletcher32 in H5Zfletcher32.c in HDF5 prior to 2.3.0 computes the data length to checksum by subtracting the 4-byte trailing checksum size from the input buffer size without checking that the buffer is at least 4 bytes, allowing a size_t underflow. This allows attackers to cause a denial of service (massively out-of-bounds read and application crash in H5_checksum_fletcher32) via a crafted HDF5 file with a Fletcher32-filtered chunk smaller than 4 bytes, triggered via H5Dread, e.g. by the h5ls or h5dump tools.

Severity

6.8 (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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-06 14:24 UTC

CWE

CWE-190 - Integer overflow or wraparound
CWE-125 - Out-of-bounds read
CWE-1284 - Improper validation of specified quantity in input

Assigner

HDFG CNA under the redhat root

CNA scorecard C 71/100 over 12 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/HDFGroup/hdf5/pull/6497
https://github.com/HDFGroup/hdf5/issues/6488
https://github.com/HDFGroup/hdf5/issues/6490

Impacted products

1 product

Vendor	Product	Version
The HDF Group	HDF5	Affected: <=2.3.0

Show details on NVD website

JSON

To clipboard

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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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2026-4459 (CVE-2026-19023)

CVE-2026-19023 (GCVE-0-2026-19023)

CVE-2026-19024 (GCVE-0-2026-19024)

CVE-2026-19026 (GCVE-0-2026-19026)

CVE-2026-19027 (GCVE-0-2026-19027)

CVE-2026-19028 (GCVE-0-2026-19028)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour