CVE-2021-46242: hdfgroup hdf5 Use After Free
Vulnerability summary
CVE-2021-46242 is a high (CVSS 8.8) Use After Free vulnerability in hdfgroup hdf5. EPSS estimates a 1.25% chance of exploitation in the next 30 days, higher than 69.3% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (GitHub, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 6 · Related 6Timeline
- 21-01-2022PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
HDF5 v1.13.1-1 was discovered to contain a heap-use-after free via the component H5AC_unpin_entry.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.25%
Chance of exploitation in the next 30 days
Percentile
69%
Versus all other CVEs
30-day change
Increase +0.09 pp
From 1.16% 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) | < 1.14.5+repack-1
Hdfgroup1 product
- hdf51.13.1-1
3 vendors · 8 products
