CVE-2026-34734
Fixed in a distro release EPSS <1%CVSS 7.8
HDF5 is software for managing data. In 1.14.1-2 and earlier, a heap-use-after-free was found in the h5dump helper utility. An attacker who can supply a malicious h5 file can trigger a heap use-after-free. The freed object is referenced in a memmove call from H5T__conv_struct. The original object was allocated by H5D__typeinfo_init_phase3 and freed by H5D__typeinfo_term.
Products: hdfgroup hdf5, Red Hat Enterprise Linux AI (RHEL AI) 3
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | hdf5 | no fix |
| Debian 13 | hdf5 | no fix |
| Debian 14 | hdf5 | no fix |
| Red Hat hummingbird 1 | hdf5 | 0:2.2.0-0.1.1.hum1 |
| Red Hat hummingbird 1 | hdf5-devel | 0:2.2.0-0.1.1.hum1 |
| Red Hat hummingbird 1 | hdf5-mpich | 0:2.2.0-0.1.1.hum1 |
| Red Hat hummingbird 1 | hdf5-mpich-devel | 0:2.2.0-0.1.1.hum1 |
| Red Hat hummingbird 1 | hdf5-mpich-static | 0:2.2.0-0.1.1.hum1 |
| Red Hat hummingbird 1 | hdf5-openmpi | 0:2.2.0-0.1.1.hum1 |
| Red Hat hummingbird 1 | hdf5-openmpi-devel | 0:2.2.0-0.1.1.hum1 |
| Red Hat hummingbird 1 | hdf5-openmpi-static | 0:2.2.0-0.1.1.hum1 |
| Red Hat hummingbird 1 | hdf5-static | 0:2.2.0-0.1.1.hum1 |
| Red Hat hummingbird 1 | java-hdf5 | 0:2.2.0-0.1.1.hum1 |
| Ubuntu 22.04 LTS | hdf5 | no fix |
| Ubuntu 24.04 LTS | hdf5 | no fix |
| Ubuntu 25.10 | hdf5 | no fix |
| Ubuntu 26.04 LTS | hdf5 | no fix |
| Ubuntu 26.10 | hdf5 | no fix |
| Ubuntu Pro 14.04 LTS | hdf5 | no fix |
| Ubuntu Pro 16.04 LTS | hdf5 | no fix |
| Ubuntu Pro 18.04 LTS | hdf5 | no fix |
| Ubuntu Pro 20.04 LTS | hdf5 | no fix |