{"id":"UBUNTU-CVE-2026-120754","details":"HDF5 through 2.2.0 contains an uninitialized memory read vulnerability in H5Z__filter_scaleoffset() in src/H5Zscaleoffset.c. The decode path validates reads against the allocated size of the chunk buffer rather than the number of bytes actually read from the file. Because H5D__chunk_lock() deliberately sizes filtered chunk buffers to the larger of the stored and unfiltered chunk sizes and fills only the stored bytes, a truncated chunk passes these bounds checks and is decompressed from the uninitialized remainder of the allocation. Unrelated heap contents are then returned to the caller as dataset data. Because the reads remain within the allocation, the issue is not detected by AddressSanitizer. An attacker who can get a user or application to read a dataset from a crafted HDF5 file can cause disclosure of process memory. This issue exists because of an incomplete fix for CVE-2026-19029.","modified":"2026-11-05T11:47:28.412442722Z","published":"2026-11-03T16:17:00Z","upstream":["CVE-2026-120754"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-120754"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-120754"},{"type":"REPORT","url":"https://github.com/HDFGroup/hdf5/pull/6585"},{"type":"REPORT","url":"https://github.com/HDFGroup/hdf5/commit/cdb13c4de9c7edbbae180f384e2e610a3b3cf185"}],"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-2026-120754.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_version":"1.8.16+docs-4ubuntu1.1+esm2","binary_name":"libhdf5-openmpi-10"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120754.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_version":"1.10.0-patch1+docs-4ubuntu0.1~esm2","binary_name":"libhdf5-java"},{"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-2026-120754.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_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"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120754.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-4ubuntu2"},{"binary_version":"1.10.7+repack-4ubuntu2","binary_name":"libhdf5-103"},{"binary_version":"1.10.7+repack-4ubuntu2","binary_name":"libhdf5-103-1"},{"binary_name":"libhdf5-cpp-103","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_name":"libhdf5-cpp-103-1","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_name":"libhdf5-fortran-102","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_name":"libhdf5-hl-100","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_name":"libhdf5-hl-cpp-100","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_name":"libhdf5-hl-fortran-100","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_name":"libhdf5-java","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_name":"libhdf5-jni","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_name":"libhdf5-mpich-103","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_version":"1.10.7+repack-4ubuntu2","binary_name":"libhdf5-mpich-103-1"},{"binary_version":"1.10.7+repack-4ubuntu2","binary_name":"libhdf5-mpich-cpp-103-1"},{"binary_name":"libhdf5-mpich-fortran-102","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_name":"libhdf5-mpich-hl-100","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_name":"libhdf5-mpich-hl-cpp-100","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_version":"1.10.7+repack-4ubuntu2","binary_name":"libhdf5-mpich-hl-fortran-100"},{"binary_version":"1.10.7+repack-4ubuntu2","binary_name":"libhdf5-openmpi-103"},{"binary_version":"1.10.7+repack-4ubuntu2","binary_name":"libhdf5-openmpi-103-1"},{"binary_version":"1.10.7+repack-4ubuntu2","binary_name":"libhdf5-openmpi-cpp-103-1"},{"binary_name":"libhdf5-openmpi-fortran-102","binary_version":"1.10.7+repack-4ubuntu2"},{"binary_version":"1.10.7+repack-4ubuntu2","binary_name":"libhdf5-openmpi-hl-100"},{"binary_version":"1.10.7+repack-4ubuntu2","binary_name":"libhdf5-openmpi-hl-cpp-100"},{"binary_version":"1.10.7+repack-4ubuntu2","binary_name":"libhdf5-openmpi-hl-fortran-100"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120754.json"}},{"package":{"name":"hdf5","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/hdf5?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.8+repack1-1ubuntu1","1.10.10+repack-3ubuntu1","1.10.10+repack-3.1ubuntu3","1.10.10+repack-3.1ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_name":"hdf5-helpers","binary_version":"1.10.10+repack-3.1ubuntu4"},{"binary_version":"1.10.10+repack-3.1ubuntu4","binary_name":"hdf5-tools"},{"binary_name":"libhdf5-103-1t64","binary_version":"1.10.10+repack-3.1ubuntu4"},{"binary_name":"libhdf5-cpp-103-1t64","binary_version":"1.10.10+repack-3.1ubuntu4"},{"binary_version":"1.10.10+repack-3.1ubuntu4","binary_name":"libhdf5-fortran-102t64"},{"binary_name":"libhdf5-hl-100t64","binary_version":"1.10.10+repack-3.1ubuntu4"},{"binary_name":"libhdf5-hl-cpp-100t64","binary_version":"1.10.10+repack-3.1ubuntu4"},{"binary_name":"libhdf5-hl-fortran-100t64","binary_version":"1.10.10+repack-3.1ubuntu4"},{"binary_version":"1.10.10+repack-3.1ubuntu4","binary_name":"libhdf5-java"},{"binary_version":"1.10.10+repack-3.1ubuntu4","binary_name":"libhdf5-jni"},{"binary_name":"libhdf5-mpich-103-1t64","binary_version":"1.10.10+repack-3.1ubuntu4"},{"binary_version":"1.10.10+repack-3.1ubuntu4","binary_name":"libhdf5-mpich-cpp-103-1t64"},{"binary_version":"1.10.10+repack-3.1ubuntu4","binary_name":"libhdf5-mpich-fortran-102t64"},{"binary_name":"libhdf5-mpich-hl-100t64","binary_version":"1.10.10+repack-3.1ubuntu4"},{"binary_version":"1.10.10+repack-3.1ubuntu4","binary_name":"libhdf5-mpich-hl-cpp-100t64"},{"binary_version":"1.10.10+repack-3.1ubuntu4","binary_name":"libhdf5-mpich-hl-fortran-100t64"},{"binary_name":"libhdf5-openmpi-103-1t64","binary_version":"1.10.10+repack-3.1ubuntu4"},{"binary_name":"libhdf5-openmpi-cpp-103-1t64","binary_version":"1.10.10+repack-3.1ubuntu4"},{"binary_name":"libhdf5-openmpi-fortran-102t64","binary_version":"1.10.10+repack-3.1ubuntu4"},{"binary_version":"1.10.10+repack-3.1ubuntu4","binary_name":"libhdf5-openmpi-hl-100t64"},{"binary_version":"1.10.10+repack-3.1ubuntu4","binary_name":"libhdf5-openmpi-hl-cpp-100t64"},{"binary_version":"1.10.10+repack-3.1ubuntu4","binary_name":"libhdf5-openmpi-hl-fortran-100t64"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120754.json"}},{"package":{"name":"hdf5","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/hdf5?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.14.6+repack-2","2.2.0+repack-4","2.2.0+repack-5"],"ecosystem_specific":{"binaries":[{"binary_name":"hdf5-helpers","binary_version":"2.2.0+repack-5"},{"binary_name":"hdf5-tools","binary_version":"2.2.0+repack-5"},{"binary_name":"libhdf5-320","binary_version":"2.2.0+repack-5"},{"binary_name":"libhdf5-cpp-320","binary_version":"2.2.0+repack-5"},{"binary_name":"libhdf5-fortran-320","binary_version":"2.2.0+repack-5"},{"binary_version":"2.2.0+repack-5","binary_name":"libhdf5-hl-320"},{"binary_version":"2.2.0+repack-5","binary_name":"libhdf5-hl-cpp-320"},{"binary_version":"2.2.0+repack-5","binary_name":"libhdf5-hl-fortran-320"},{"binary_version":"2.2.0+repack-5","binary_name":"libhdf5-java"},{"binary_version":"2.2.0+repack-5","binary_name":"libhdf5-jni"},{"binary_version":"2.2.0+repack-5","binary_name":"libhdf5-mpich-320"},{"binary_version":"2.2.0+repack-5","binary_name":"libhdf5-mpich-cpp-320"},{"binary_version":"2.2.0+repack-5","binary_name":"libhdf5-mpich-fortran-320"},{"binary_name":"libhdf5-mpich-hl-320","binary_version":"2.2.0+repack-5"},{"binary_name":"libhdf5-mpich-hl-cpp-320","binary_version":"2.2.0+repack-5"},{"binary_name":"libhdf5-mpich-hl-fortran-320","binary_version":"2.2.0+repack-5"},{"binary_version":"2.2.0+repack-5","binary_name":"libhdf5-openmpi-320"},{"binary_version":"2.2.0+repack-5","binary_name":"libhdf5-openmpi-cpp-320"},{"binary_version":"2.2.0+repack-5","binary_name":"libhdf5-openmpi-fortran-320"},{"binary_name":"libhdf5-openmpi-hl-320","binary_version":"2.2.0+repack-5"},{"binary_name":"libhdf5-openmpi-hl-cpp-320","binary_version":"2.2.0+repack-5"},{"binary_version":"2.2.0+repack-5","binary_name":"libhdf5-openmpi-hl-fortran-320"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120754.json"}},{"package":{"name":"hdf5","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/hdf5?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.14.5+repack-3build1","1.14.5+repack-4","1.14.6+repack-2"],"ecosystem_specific":{"binaries":[{"binary_name":"hdf5-helpers","binary_version":"1.14.6+repack-2"},{"binary_name":"hdf5-tools","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-310","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-cpp-310","binary_version":"1.14.6+repack-2"},{"binary_version":"1.14.6+repack-2","binary_name":"libhdf5-fortran-310"},{"binary_name":"libhdf5-hl-310","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-hl-cpp-310","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-hl-fortran-310","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-java","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-jni","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-mpich-310","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-mpich-cpp-310","binary_version":"1.14.6+repack-2"},{"binary_version":"1.14.6+repack-2","binary_name":"libhdf5-mpich-fortran-310"},{"binary_name":"libhdf5-mpich-hl-310","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-mpich-hl-cpp-310","binary_version":"1.14.6+repack-2"},{"binary_version":"1.14.6+repack-2","binary_name":"libhdf5-mpich-hl-fortran-310"},{"binary_version":"1.14.6+repack-2","binary_name":"libhdf5-openmpi-310"},{"binary_name":"libhdf5-openmpi-cpp-310","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-openmpi-fortran-310","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-openmpi-hl-310","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-openmpi-hl-cpp-310","binary_version":"1.14.6+repack-2"},{"binary_name":"libhdf5-openmpi-hl-fortran-310","binary_version":"1.14.6+repack-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120754.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}