CVE-2021-46243: hdfgroup hdf5 NULL Pointer Dereference
Vulnerability summary
CVE-2021-46243 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in hdfgroup hdf5. EPSS estimates a 0.95% chance of exploitation in the next 30 days, higher than 61.4% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Timeline
- 21-01-2022PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An untrusted pointer dereference vulnerability exists in HDF5 v1.13.1-1 via the function H5O__dtype_decode_helper () at hdf5/src/H5Odtype.c. This vulnerability can lead to a Denial of Service (DoS).
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.95%
Chance of exploitation in the next 30 days
Percentile
61%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.95% 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
1 foundHdf5
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu6 products
- hdf5All versions (No fix recorded)
- insighttoolkit4All versions (No fix recorded)
- kisspliceAll versions (No fix recorded)
- paraviewAll versions (No fix recorded)
- vtkAll versions (No fix recorded)
Debian1 product
- hdf5All versions (No fix recorded)
Hdfgroup1 product
- hdf51.13.1-1
3 vendors · 8 products
