CVE-2026-26197— Array full size, element count, and element size are not checked to make sure they match in H5Odtype.c

Array full size, element count, and element size are not checked to make sure they match in H5Odtype.c

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.

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

跨界内存读

HDFGroup hdf5 缓冲区错误漏洞

hdfgroup hdf5是hdfgroup组织开源的一种分层数据格式库。 HDFGroup hdf5 2.0.0之前版本存在缓冲区错误漏洞，该漏洞源于数组数据类型大小、元素数量和元素大小不一致时，可能触发越界读取。

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