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CVE-2026-106547— HDF5 heap buffer overflow in H5VM_array_fill via crafted fill-value metadata

Quick assessment

Affected
The HDF Group HDF5
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HDF5 2.2.0 版本之前，位于 src/H5VM.c 中的 H5VM_array_fill() 函数存在基于堆的缓冲区溢出漏洞。攻击者可以通过构造特定的 HDF5 文件，导致远程应用程序崩溃，并可能执行任意代码。当读取数据集中未分配的数据块时，H5D__fill_init() 会利用文件中的数据类型和数据空间元数据来填充填充值缓冲区。如果这些元数据与缓冲区实际分配大小不一致，写入操作就会超出缓冲区边界。攻击者可以通过文件中存储的填充值控制写入的内容。

CVSS 8.5 · High
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I. Basic Information for CVE-2026-106547

Vulnerability Information
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Vulnerability Title
HDF5 heap buffer overflow in H5VM_array_fill via crafted fill-value metadata
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
The HDF Group HDF5 1.10.0 ~ 2.2.0 -

II. Public POCs for CVE-2026-106547

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III. Intelligence Information for CVE-2026-106547

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Other References for CVE-2026-106547 (1)

IV. Related Vulnerabilities

Same product: HDF5
Same vendor: The HDF Group
Same weakness: CWE-122

V. Comments for CVE-2026-106547

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