Is CVE-2021-45833 in the CISA KEV catalog?

No. CVE-2021-45833 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-45833?

CVE-2021-45833 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-45833?

CVE-2021-45833 has an EPSS score of 0.69% (48th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-45833?

Upgrade hdf5 on debian 13 to 1.14.5+repack-1 or later.

CVE & CISA-KEV Catalog

CVE-2021-45833

MEDIUM

5.5

CVSS v3

NVD

Description

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).

CWE-787Out-of-bounds Write

How to fix

Remediation Available

hdf5Debian

Fixed in:1.14.5+repack-1CVE-2021-45833

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploit Intelligence

0.69%probability of exploitation in 30 days

48thpercentile

Moderate risk: more likely to be exploited than 48% of all known CVEs.

References

Exploit1

github.com

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.