Is CVE-2021-37501 in the CISA KEV catalog?

No. CVE-2021-37501 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-37501?

CVE-2021-37501 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-37501?

CVE-2021-37501 has an EPSS score of 1.54% (72th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-37501?

Upgrade hdf5 on debian 13 to 1.14.5+repack-1 or later. Fixes are available for 27 affected products.

CVE & CISA-KEV Catalog

CVE-2021-37501

HIGHEPSS 72th pctl

7.5

CVSS v3

NVD

Description

Buffer Overflow vulnerability in HDFGroup hdf5-h5dump 1.12.0 through 1.13.0 allows attackers to cause a denial of service via h5tools_str_sprint in /hdf5/tools/lib/h5tools_str.c.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

hdf5Debian

Fixed in:1.14.5+repack-1CVE-2021-37501

hdf5Red Hat / RHEL

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5Rocky

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-debuginfoRed Hat / RHEL

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-debuginfoRocky

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-debugsourceRocky

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-debugsourceRed Hat / RHEL

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-develRed Hat / RHEL

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-develRocky

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-openmpiRocky

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-openmpiRed Hat / RHEL

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-openmpi-debuginfoRed Hat / RHEL

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-openmpi-debuginfoRocky

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-openmpi-develRocky

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-openmpi-develRed Hat / RHEL

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-openmpi-staticRed Hat / RHEL

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-openmpi-staticRocky

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-staticRocky

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

hdf5-staticRed Hat / RHEL

Fixed in:0:1.14.6-3.1.el9aiRHSA-2025:3801

libaecRed Hat / RHEL

Fixed in:0:1.1.3-1.el9aiRHSA-2025:3801

libaecRocky

Fixed in:0:1.1.3-1.el9aiRHSA-2025:3801

libaec-debuginfoRocky

Fixed in:0:1.1.3-1.el9aiRHSA-2025:3801

libaec-debuginfoRed Hat / RHEL

Fixed in:0:1.1.3-1.el9aiRHSA-2025:3801

libaec-debugsourceRocky

Fixed in:0:1.1.3-1.el9aiRHSA-2025:3801

libaec-debugsourceRed Hat / RHEL

Fixed in:0:1.1.3-1.el9aiRHSA-2025:3801

libaec-develRed Hat / RHEL

Fixed in:0:1.1.3-1.el9aiRHSA-2025:3801

libaec-develRocky

Fixed in:0:1.1.3-1.el9aiRHSA-2025:3801

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.54%probability of exploitation in 30 days

72ndpercentile

Elevated risk: more likely to be exploited than 72% of all known CVEs.

References

Exploit1

github.com

Third-Party Advisory1

github.com

Other references1

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 2025-03-26.