HDF5 1.13.1-1 is affected by: segmentation fault, which causes a Denial of Service.

published 2022-01-03 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-32547

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

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-2021-45829 updated 2025-11-21 cvss 5.5

hdf5: segmentation fault may cause a Denial of Service

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

0.69% 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/1317 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

CWE-404 Improper Resource Shutdown or Release

References

github.com /HDFGroup/hdf5/issues/1317
exploit, issue-tracking, third-party-advisory

Sources

CVE List CVE-2021-45829
NVD CVE-2021-45829

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.

Summary