CVE catalog
CVE-2026-19025
H5O__layout_decode in H5Olayout.c in HDF5 through 2.3.0 does not validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank when an existing dataset is opened, whe
- Severity
- Medium · CVSS 6.8
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.17% · Oct 25, 2026
H5O__layout_decode in H5Olayout.c in HDF5 through 2.3.0 does not validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank when an existing dataset is opened, whereas this check is performed only at dataset-creation time. This allows attackers to cause a denial of service (divide-by-zero and application crash in H5S__hyper_iter_get_seq_list in src/H5Shyper.c) via a crafted HDF5 file with mismatched chunk/dataspace ranks that is opened and read via H5Dopen2 and H5Dread, e.g. by the h5repack tool.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | hdf5 | sid | 2.2.0+repack-5 | vulnerable |
| Debian | hdf5 | forky | 2.2.0+repack-5 | vulnerable |
| Debian | hdf5 | trixie | 1.14.5+repack-3 | vulnerable |
| Debian | hdf5 | bookworm | 1.10.8+repack1-1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | hdf5 | source | sid | (unfixed) | unimportant | Not reported | Not reported |
| Debian | hdf5 | source | forky | (unfixed) | unimportant | Not reported | Not reported |
| Debian | hdf5 | source | trixie | (unfixed) | unimportant | Not reported | Not reported |
| Debian | hdf5 | source | bookworm | (unfixed) | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [hdf5-helpers]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [hdf5-tools]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-103]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-103-1]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-cpp-103]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-cpp-103-1]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-dev]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-doc]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· all · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· all · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-fortran-102]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-hl-100]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-hl-cpp-100]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-hl-fortran-100]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-java]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· all · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· all · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-jni]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-mpich-103]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-mpich-103-1]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-mpich-cpp-103-1]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-mpich-dev]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-mpich-fortran-102]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
- [libhdf5-mpich-hl-100]Affected
Source package: [hdf5]
Details (2)
1.10.8+repack1-1· amd64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
1.10.8+repack1-1· arm64 · bookwormAffected
nvd · hdf5 · debian · bookworm; nvd · hdf5 · debian · 12
Observed:
References
- [https://github.com/HDFGroup/hdf5/issues/6491]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-19025]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-19025]
- [https://security-tracker.debian.org/tracker/CVE-2026-19025]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-19025.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]