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Fencer Vulns
medium 5.5

CVE-2021-45833 json

A Stack-based Buffer Overflow Vulnerability exists in HDF5 1.13.1-1 via the H5D__create_chunk_file_map_hyper function in /hdf5/src/H5Dchunk…

published 2022-01-05 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-32551

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

A Stack-based Buffer Overflow Vulnerability exists in HDF5 1.13.1-1 via the H5D__create_chunk_file_map_hyper function in /hdf5/src/H5Dchunk.c, which causes a Denial of Service (context-dependent).

Patch / fix

  • hdf5 Debian 14, Debian 13 1.14.5+repack-1

debian advisories DEBIAN-CVE-2021-45833

  • hdf5_1_10_8-gnu-hpc SLE Module for Package Hub 15 SP3, SLE Module for HPC 15 SP3, openSUSE Leap 15.4 +1 more 1.10.8-150300.4.6.1
  • hdf5_1_10_8-gnu-mpich-hpc SLE Module for Package Hub 15 SP3, SLE Module for HPC 15 SP3, openSUSE Leap 15.4 +1 more 1.10.8-150300.4.6.1
  • hdf5_1_10_8-gnu-mvapich2-hpc SLE Module for Package Hub 15 SP3, SLE Module for HPC 15 SP3, openSUSE Leap 15.4 +1 more 1.10.8-150300.4.6.1
  • hdf5_1_10_8-gnu-openmpi3-hpc SLE Module for Package Hub 15 SP3, SLE Module for HPC 15 SP3, openSUSE Leap 15.4 +1 more 1.10.8-150300.4.6.1
  • hdf5_1_10_8-gnu-openmpi4-hpc SLE Module for Package Hub 15 SP3, SLE Module for HPC 15 SP3, openSUSE Leap 15.4 +1 more 1.10.8-150300.4.6.1
  • hdf5_1_10_8-gnu-hpc SLE High Performance Computing 15-LTSS, SLE High Performance Computing 15-ESPOS 1.10.8-150000.8.7.1
  • hdf5_1_10_8-gnu-mpich-hpc SLE High Performance Computing 15-LTSS, SLE High Performance Computing 15-ESPOS 1.10.8-150000.8.7.1
  • hdf5_1_10_8-gnu-mvapich2-hpc SLE High Performance Computing 15-LTSS, SLE High Performance Computing 15-ESPOS 1.10.8-150000.8.7.1

suse advisories SUSE-SU-2022:3829-1SUSE-SU-2022:3828-1SUSE-SU-2022:3827-1SUSE-SU-2022:3826-1SUSE-SU-2022:3825-1SUSE-SU-2022:3824-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-45833 updated cvss 5.5

hdf5: stack buffer overflow in the H5D__create_chunk_file_map_hyper function

  • Red Hat OpenStack Platform 13 (Queens) hdf5
    affected: no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 16.1 hdf5
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/HDFGroup/hdf5/issues/1313 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.