HDF Group HDF5 up to 2.1.x src/H5VM.c H5VM_array_fill heap-based overflow

Summaryinfo

A vulnerability was found in HDF Group HDF5 up to 2.1.x. It has been declared as critical. This issue affects the function H5VM_array_fill of the file src/H5VM.c. Executing a manipulation can lead to heap-based overflow. This vulnerability is handled as CVE-2026-106547. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in HDF Group HDF5 up to 2.1.x and classified as critical. This vulnerability affects the function H5VM_array_fill of the file src/H5VM.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A heap-based buffer overflow in H5VM_array_fill() in src/H5VM.c in HDF5 before 2.2.0 lets a remote attacker cause an application crash and possibly execute arbitrary code with a crafted HDF5 file. When a dataset's unallocated chunks are read, H5D__fill_init() fills the fill-value buffer from datatype and dataspace metadata in the file. If that metadata is inconsistent with the buffer's allocated size, the write goes past the end of the buffer. The attacker can control the content written through the fill value stored in the file.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-106547 since 10/06/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 2.2.0 eliminates this vulnerability.

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Productinfo

Type

• Database Software

Vendor

• HDF Group

Name

• HDF5

Version

• 2.0
• 2.1

License

• free

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

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• 🔒

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