How severe is CVE-2024-32621?

CVE-2024-32621 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-32621 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-32621?

CVE-2024-32621 affects Hdfgroup Hdf5. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-32621?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2024-32621 have an EU (EUVD) identifier?

Yes. CVE-2024-32621 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-30423.

When was CVE-2024-32621 published?

CVE-2024-32621 was published on 2024-05-14 and last updated on 2026-06-17.

CVE-2024-32621

CVE-2024-32621 is a critical-severity vulnerability in Hdfgroup Hdf5 with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-30423
Weakness: CWE-122
Affected product: Hdfgroup Hdf5
Published: 2024-05-14
Last modified: 2026-06-17

Description

HDF5 Library through 1.14.3 contains a heap-based buffer overflow in H5HG_read in H5HG.c (called from H5VL__native_blob_get in H5VLnative_blob.c), resulting in the corruption of the instruction pointer.

Frequently asked questions

What is CVE-2024-32621?: HDF5 Library through 1.14.3 contains a heap-based buffer overflow in H5HG_read in H5HG.c (called from H5VL__native_blob_get in H5VLnative_blob.c), resulting in the corruption of the instruction pointer.
How severe is CVE-2024-32621?: CVE-2024-32621 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-32621 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-32621?: CVE-2024-32621 affects Hdfgroup Hdf5. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-32621?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-32621 have an EU (EUVD) identifier?: Yes. CVE-2024-32621 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-30423.
When was CVE-2024-32621 published?: CVE-2024-32621 was published on 2024-05-14 and last updated on 2026-06-17.

References

https://www.hdfgroup.org/2024/05/new-hdf5-cve-issues-fixed-in-1-14-4/

Affected products (1)

cpe:2.3:a:hdfgroup:hdf5:*:*:*:*:*:*:*:*

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