CVE-2024-32621: hdfgroup hdf5 Heap-based Buffer Overflow
Vulnerability summary
CVE-2024-32621 is a critical (CVSS 9.8) Heap-based Buffer Overflow vulnerability in hdfgroup hdf5. EPSS estimates a 0.93% chance of exploitation in the next 30 days, higher than 60.5% of scored vulnerabilities.
Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 1Timeline
- 09-05-2024PublishedVulnerability first disclosed.
- 13-02-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.93%
Chance of exploitation in the next 30 days
Percentile
61%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.93% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- hdf5All versions (No fix recorded) | < 1.14.5+repack-1
Hdfgroup1 product
- hdf5< 1.14.4
Ubuntu1 product
- hdf5All versions (No fix recorded)
3 vendors · 3 products
