CVE-2026-26199

Description

HDF5 is a high-performance library and a file format specification that implements the HDF5 data model. If `H5Iget_name` is invoked on a group id with `0` for the size parameter, it will underflow when trying to place a null terminator in the buffer. This can occur if `H5Iget_name` is invoked in a way where `size` can be forced to zero, and there is important data before the `name` buffer.

Weakness classification

• security-advisories@github.com: CWE-124

Primary references

• security-advisories@github.com — Exploit
• security-advisories@github.com — Vendor Advisory
• 134c704f-9b21-4f2e-91b3-4a467353bcc0 — Vendor Advisory