CVE catalog
CVE-2026-34734
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-f
- Severity
- High · CVSS 7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.19% · Oct 27, 2026
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.
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 |
| Cpe | hdf5 | Not reported | Not reported | vulnerable |
| Cpe | hdf5 | Not reported | 1.14.1-2 | fixed |
| Cpe | hdf5 | Not reported | 1.14.1-2 | fixed |
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 |
| Cpe | hdf5 | cpe | Not reported | 1.14.1-2 | Not reported | Not reported | Not reported |
| Cpe | hdf5 | cpe | Not reported | 1.14.1-2 | Not reported | NVD-CVE-2026-34734 | 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://access.redhat.com/security/cve/CVE-2026-34734]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2457034]
- [https://github.com/HDFGroup/hdf5/security/advisories/GHSA-w7v2-9cmr-pwwj]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-34734]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-34734]
- [https://security-tracker.debian.org/tracker/CVE-2026-34734]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34734.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]