Home/CVE/HDF5 v1.13.1-1 was discovered to contain a heap-use-after free via the component H5AC_unpin_entry.
CVE

CVE-2021-46242

HDF5 v1.13.1-1 was discovered to contain a heap-use-after free via the component H5AC_unpin_entry.

HDF5 v1.13.1-1 was discovered to contain a heap-use-after free via the component H5AC_unpin_entry.

HIGH · CVSS 8.8 EPSS 0.00291
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
Look this up elsewhere - one-click external pivots
NVDCVE.orgCISAVulnersExploit-DBGitHub PoCVulnCheck KEVGreyNoise
▸ How to read a CVE - triage first, then detect and patch
This page is every public fact about CVE-2021-46242, cross-linked. Its job is to answer one question fast - does this need my attention now? - and then hand you the two things you do about it. Here is how an analyst reads it.
Triage: should I act now? Four signals, and they are not interchangeable:
CVSSseverity - how bad it is IF exploited, 0-10. A high CVSS alone is not urgency; a flaw can be a perfect 10 and never actually be attacked. EPSSprobability - a model’s estimate of the chance it is exploited in the next 30 days, 0-1. This is the “will it actually happen” signal. CISA KEVconfirmed - it is being exploited in the wild right now. The strongest signal on the page; KEV beats any score. Weaponisedavailability - public exploits / PoCs, and especially Metasploit modules rated Excellent / Great. Reliable, packaged exploit code means low-skill attackers can use it today.
How they combine: KEV, or a dependable Metasploit module, means patch now regardless of CVSS. High CVSS + low EPSS + no exploit is real but not an emergency - schedule it. Low CVSS but KEV-listed still gets patched now. The verdict above already weighed these for you; this is how it got there.
Then what - two workflows:
Detectwhen you cannot patch today, follow this CVE to the ATT&CK techniques it enables, then Build a SIEM detection (the green button) - author a rule, test it in Atomic, deploy it. That buys visibility while the patch waits. PatchAffected products / packages tell you if you are exposed; Fixed versions by distribution and Vendor advisories give the exact version that closes it.
Reading order for the panels below: verdict + badges, then Public exploits / Metasploit (is it weaponised), then ATT&CK techniques + Sigma / IDS rules (can I detect it), then Affected products / packages + Fixed versions (am I exposed, what patches it), then Threat actors / IOCs (who uses it), then Scoring & timeline / references (the evidence).
◆

ATT&CK techniques

2

Techniques this CVE enables - linked via CWECAPECATT&CK. High◆ = named directly in ATT&CK or Nuclei templates.

T1203 · Exploitation for Client Execution T1566 · Phishing
▤ Build a SIEM detection for these techniques
⬡

Weakness Classification

CWE-416Use After Free
▤

Affected Products & Versions

1
hdfgroup hdf5all versions
▤

Affected Packages

27
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Ubuntu:20.04:LTS hdf5
Ubuntu:20.04:LTS insighttoolkit4
Ubuntu:20.04:LTS kissplice
Ubuntu:20.04:LTS paraview
Ubuntu:20.04:LTS xdmf
Ubuntu:22.04:LTS hdf5
Ubuntu:22.04:LTS insighttoolkit4
Ubuntu:22.04:LTS kissplice
Ubuntu:22.04:LTS paraview
Ubuntu:22.04:LTS xdmf
Ubuntu:24.04:LTS hdf5
Ubuntu:24.04:LTS kissplice
Ubuntu:24.04:LTS paraview
Ubuntu:24.04:LTS xdmf
Ubuntu:Pro:14.04:LTS hdf5
Ubuntu:Pro:14.04:LTS vtk
Ubuntu:Pro:16.04:LTS hdf5
Ubuntu:Pro:16.04:LTS insighttoolkit4
Ubuntu:Pro:16.04:LTS kissplice
Ubuntu:Pro:16.04:LTS paraview
Ubuntu:Pro:16.04:LTS vtk
Ubuntu:Pro:16.04:LTS xdmf
Ubuntu:Pro:18.04:LTS hdf5
Ubuntu:Pro:18.04:LTS insighttoolkit4
Ubuntu:Pro:18.04:LTS kissplice
Ubuntu:Pro:18.04:LTS paraview
Ubuntu:Pro:18.04:LTS xdmf
⚠

Public Exploits & PoCs

3
These PoC and exploit links come from public sources and are not verified to be safe or functional. Review the code before running anything, and treat unverified entries as untrusted.
pocPublic PoC (nvd-reference)
pocHDFGroup/hdf5 (trickest)
pocgithub.com · 1329github.com
📦

Fixed versions by distribution

80
The package version that resolves this CVE on each Linux distribution, from the vendor’s published security data. fixed in shows a patched version exists; open means the package is listed as affected with no fix yet.
suse sle15hdf5 fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-devel fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-devel-data fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-devel-static fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-examples fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-gnu-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-gnu-hpc-devel fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5-gnu-mpich-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5-gnu-mpich-hpc-devel fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-gnu-mvapich2-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-gnu-mvapich2-hpc-devel fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5-gnu-openmpi3-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-gnu-openmpi3-hpc-devel fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5-gnu-openmpi4-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-gnu-openmpi4-hpc-devel fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-hpc-examples fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-mvapich2 fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-mvapich2-devel fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-mvapich2-devel-static fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-openmpi2 fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-openmpi2-devel fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-openmpi2-devel-static fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-openmpi3 fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-openmpi3-devel fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-openmpi3-devel-static fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-openmpi4 fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-openmpi4-devel fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5-openmpi4-devel-static fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5_1_10_8-gnu-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5_1_10_8-gnu-hpc-devel fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5_1_10_8-gnu-hpc-devel-static fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5_1_10_8-gnu-hpc-module fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5_1_10_8-gnu-mpich-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5_1_10_8-gnu-mpich-hpc-devel fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5_1_10_8-gnu-mpich-hpc-devel-static fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5_1_10_8-gnu-mpich-hpc-module fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5_1_10_8-gnu-mvapich2-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5_1_10_8-gnu-mvapich2-hpc-devel fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5_1_10_8-gnu-mvapich2-hpc-devel-static fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5_1_10_8-gnu-mvapich2-hpc-module fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5_1_10_8-gnu-openmpi3-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5_1_10_8-gnu-openmpi3-hpc-devel fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5_1_10_8-gnu-openmpi3-hpc-devel-static fixed in 0:1.10.8-150400.3.3.1
suse sle15hdf5_1_10_8-gnu-openmpi3-hpc-module fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5_1_10_8-gnu-openmpi4-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5_1_10_8-gnu-openmpi4-hpc-devel fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5_1_10_8-gnu-openmpi4-hpc-devel-static fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5_1_10_8-gnu-openmpi4-hpc-module fixed in 0:1.10.8-150300.4.6.1
suse sle15hdf5_1_10_8-hpc-examples fixed in 0:1.10.8-150300.4.6.1
suse sle15libhdf5-103 fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5-103-mvapich2 fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5-103-openmpi2 fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5-103-openmpi3 fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5-103-openmpi4 fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5-gnu-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15libhdf5-gnu-mpich-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15libhdf5-gnu-mvapich2-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15libhdf5-gnu-openmpi2-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5-gnu-openmpi3-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5-gnu-openmpi4-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_1_10_8-gnu-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_1_10_8-gnu-mpich-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15libhdf5_1_10_8-gnu-mvapich2-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15libhdf5_1_10_8-gnu-openmpi3-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15libhdf5_1_10_8-gnu-openmpi4-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_cpp-gnu-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_cpp-gnu-mpich-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_cpp-gnu-mvapich2-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_cpp-gnu-openmpi2-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_cpp-gnu-openmpi3-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_cpp-gnu-openmpi4-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15libhdf5_cpp103 fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_cpp103-mvapich2 fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_cpp103-openmpi2 fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_cpp103-openmpi3 fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_cpp103-openmpi4 fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_cpp_1_10_8-gnu-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15libhdf5_cpp_1_10_8-gnu-mpich-hpc fixed in 0:1.10.8-150400.3.3.1
suse sle15libhdf5_cpp_1_10_8-gnu-mvapich2-hpc fixed in 0:1.10.8-150300.4.6.1
suse sle15libhdf5_cpp_1_10_8-gnu-openmpi3-hpc fixed in 0:1.10.8-150400.3.3.1
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · [email protected]
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD21 Jan 2022 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

6
suse-csafSUSE-SU-2022:3824-1
suse-csafSUSE-SU-2022:3825-1
suse-csafSUSE-SU-2022:3826-1
suse-csafSUSE-SU-2022:3827-1
suse-csafSUSE-SU-2022:3828-1
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