CVE-2026-29043: HDF5 H5T__ref_mem_setnull Heap Buffer Overflow
HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5Trefmemsetnull method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-29043?
CVE-2026-29043 is categorized as a high-severity vulnerability due to the potential for denial-of-service effects.
How do I fix CVE-2026-29043?
To resolve CVE-2026-29043, upgrade to HDF5 version 1.14.2 or later.
What systems are affected by CVE-2026-29043?
CVE-2026-29043 affects HDF5 versions 1.14.1-2 and earlier.
What is the impact of CVE-2026-29043?
The impact of CVE-2026-29043 includes potential denial-of-service conditions caused by a heap buffer overflow.
Who can exploit CVE-2026-29043?
An attacker with control over an h5 file parsed by HDF5 can exploit CVE-2026-29043.