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I. Basic Information for CVE-2026-34734
Vulnerability Information

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Vulnerability Title
HDF5: H5T__conv_struct Use After Free
Source: NVD (National Vulnerability Database)
Vulnerability Description
HDF5 is software for managing data. In 1.14.1-2 and earlier, a heap-use-after-free was found in the h5dump helper utility. An attacker who can supply a malicious h5 file can trigger a heap use-after-free. The freed object is referenced in a memmove call from H5T__conv_struct. The original object was allocated by H5D__typeinfo_init_phase3 and freed by H5D__typeinfo_term.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
释放后使用
Source: NVD (National Vulnerability Database)
Vulnerability Title
HDF5 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HDF5是HDF开源的一个库。 HDF5 1.14.1-2及之前版本存在资源管理错误漏洞,该漏洞源于h5dump辅助工具中存在堆释放后重用,攻击者提供恶意h5文件可能触发堆释放后重用,导致在H5T__conv_struct的memmove调用中引用已释放对象。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
HDFGrouphdf5 <= 1.14.1-2 -
II. Public POCs for CVE-2026-34734
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III. Intelligence Information for CVE-2026-34734
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