{"id":"UBUNTU-CVE-2026-26199","details":"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.","modified":"2026-07-31T14:38:57.651636579Z","published":"2026-07-20T16:16:00Z","upstream":["CVE-2026-26199"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-26199"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-26199"}],"affected":[{"package":{"name":"hdf5","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/hdf5?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.11-3ubuntu1","1.8.11-5ubuntu1","1.8.11-5ubuntu2","1.8.11-5ubuntu6","1.8.11-5ubuntu7","1.8.11-5ubuntu7.1","1.8.11-5ubuntu7.1+esm1","1.8.11-5ubuntu7.1+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"hdf5-helpers","binary_version":"1.8.11-5ubuntu7.1+esm2"},{"binary_version":"1.8.11-5ubuntu7.1+esm2","binary_name":"hdf5-tools"},{"binary_name":"libhdf5-7","binary_version":"1.8.11-5ubuntu7.1+esm2"},{"binary_name":"libhdf5-mpich2-7","binary_version":"1.8.11-5ubuntu7.1+esm2"},{"binary_version":"1.8.11-5ubuntu7.1+esm2","binary_name":"libhdf5-openmpi-7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26199.json"}},{"package":{"name":"hdf5","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/hdf5?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.15-patch1+docs-4","1.8.15-patch1+docs-5","1.8.16+docs-1","1.8.16+docs-2","1.8.16+docs-3","1.8.16+docs-3ubuntu1","1.8.16+docs-4","1.8.16+docs-4ubuntu1","1.8.16+docs-4ubuntu1.1","1.8.16+docs-4ubuntu1.1+esm1","1.8.16+docs-4ubuntu1.1+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"hdf5-helpers","binary_version":"1.8.16+docs-4ubuntu1.1+esm2"},{"binary_name":"hdf5-tools","binary_version":"1.8.16+docs-4ubuntu1.1+esm2"},{"binary_name":"libhdf5-10","binary_version":"1.8.16+docs-4ubuntu1.1+esm2"},{"binary_name":"libhdf5-cpp-11","binary_version":"1.8.16+docs-4ubuntu1.1+esm2"},{"binary_name":"libhdf5-mpich-10","binary_version":"1.8.16+docs-4ubuntu1.1+esm2"},{"binary_name":"libhdf5-openmpi-10","binary_version":"1.8.16+docs-4ubuntu1.1+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26199.json"}},{"package":{"name":"hdf5","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/hdf5?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.0-patch1+docs-4","1.10.0-patch1+docs-4ubuntu0.1~esm1","1.10.0-patch1+docs-4ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"hdf5-helpers","binary_version":"1.10.0-patch1+docs-4ubuntu0.1~esm2"},{"binary_version":"1.10.0-patch1+docs-4ubuntu0.1~esm2","binary_name":"hdf5-tools"},{"binary_name":"libhdf5-100","binary_version":"1.10.0-patch1+docs-4ubuntu0.1~esm2"},{"binary_name":"libhdf5-cpp-100","binary_version":"1.10.0-patch1+docs-4ubuntu0.1~esm2"},{"binary_name":"libhdf5-java","binary_version":"1.10.0-patch1+docs-4ubuntu0.1~esm2"},{"binary_name":"libhdf5-jni","binary_version":"1.10.0-patch1+docs-4ubuntu0.1~esm2"},{"binary_name":"libhdf5-mpich-100","binary_version":"1.10.0-patch1+docs-4ubuntu0.1~esm2"},{"binary_name":"libhdf5-openmpi-100","binary_version":"1.10.0-patch1+docs-4ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26199.json"}},{"package":{"name":"hdf5","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/hdf5?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.4+repack-10","1.10.4+repack-11","1.10.4+repack-11ubuntu1","1.10.4+repack-11ubuntu1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"hdf5-helpers","binary_version":"1.10.4+repack-11ubuntu1+esm1"},{"binary_name":"hdf5-tools","binary_version":"1.10.4+repack-11ubuntu1+esm1"},{"binary_name":"libhdf5-103","binary_version":"1.10.4+repack-11ubuntu1+esm1"},{"binary_name":"libhdf5-cpp-103","binary_version":"1.10.4+repack-11ubuntu1+esm1"},{"binary_version":"1.10.4+repack-11ubuntu1+esm1","binary_name":"libhdf5-java"},{"binary_name":"libhdf5-jni","binary_version":"1.10.4+repack-11ubuntu1+esm1"},{"binary_name":"libhdf5-mpich-103","binary_version":"1.10.4+repack-11ubuntu1+esm1"},{"binary_name":"libhdf5-openmpi-103","binary_version":"1.10.4+repack-11ubuntu1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26199.json"}},{"package":{"name":"hdf5","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/hdf5?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.6+repack-5","1.10.7+repack-4ubuntu1","1.10.7+repack-4ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"hdf5-helpers","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_name":"hdf5-tools","binary_version":"1.10.7+repack-4ubuntu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