CVE-2025-6816: 
NixOS vulnerability analysis and mitigation

A vulnerability classified as problematic was found in HDF5 1.14.6, identified as CVE-2025-6816. The vulnerability affects the function H5O_fsinfoencode in the file /src/H5Ofsinfo.c, discovered on June 27, 2025. This heap-based buffer overflow vulnerability requires local access to exploit (GitHub Issue, VulDB Entry).

The vulnerability is classified under CWE-122 (Heap-based Buffer Overflow) and CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). It has received a CVSS v3.1 Base Score of 3.3 (LOW) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L. The issue manifests in the H5O_fsinfoencode function where improper buffer handling leads to a heap-based buffer overflow condition (NVD, VulDB Entry).

The vulnerability primarily affects system availability with no direct impact on confidentiality or integrity. When exploited, it can cause a heap-based buffer overflow condition, potentially leading to system crashes or denial of service (VulDB Entry).

Currently, there are no known official mitigations or workarounds published for this vulnerability. It is recommended to monitor for updates from the HDF Group for a security patch (VulDB Entry).