A heap-buffer-overflow vulnerability exists in the H5FS__sect_link function of the hdf5 library, as reported by OSS-Fuzz. This vulnerability involves an out-of-bounds read of 8 bytes on the heap. Multiple specific versions of hdf5 are affected, including 1.14.1, 2.0.0, 2.1.0-pre1test, 2.1.0, 2.1.1, 2.2.0-rc1, and 2.2.0. No CVSS score or vendor patch information is provided, and no known exploits in the wild have been reported.