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  4. CVE 2026 92627 heap use after free in h5tconvff
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Back to active CVEs
Medium · CVSS 4.6CVE-2026-92627

Heap Use-After-Free in H5T__conv_f_fCVE-2026-92627

Answer in brief

CVE-2026-92627 records a Medium severity (CVSS 4.6) vulnerability in Heap Use-After-Free in H5T__conv_f_f. The current sources do not mark it as known exploited. The current feed maps The HDF Group/HDF5 (generic), The HDF Group/HDF5 (generic), The HDF Group/HDF5 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Sep 18, 2026Source checked Oct 31, 2026First seen by HOL Sep 16, 2026Material review Sep 18, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 4.6
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 4.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps The HDF Group/HDF5 (generic), The HDF Group/HDF5 (generic), The HDF Group/HDF5 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
The HDF Group/HDF5generic<1.14.21.14.2
The HDF Group/HDF5generic<=2.3.0Not reported
The HDF Group/HDF5generic1.14.1Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for The HDF Group/HDF5, The HDF Group/HDF5, The HDF Group/HDF5.
  2. 2Review the reported fix. Update The HDF Group/HDF5 to 1.14.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 18, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 16, 2026

Sources and claim methodology

  • Source referencepulsesecurity.co.nz
Upstream source description

A heap-use-after-free vulnerability exists in H5T__conv_f_f() in src/H5Tconv.c in HDF5 before 1.14.2. When converting a compound datatype containing floating-point members during a dataset read, a temporary buffer allocated with calloc() is freed and subsequently read from within the same conversion routine. An attacker who can supply a crafted HDF5 file containing a specially constructed compound datatype can trigger the use-after-free when the file is parsed by an application that reads the affected dataset, such as h5dump. This can result in a crash and, depending on heap layout and allocator behavior, may be exploitable for further memory corruption up to remote code execution.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-416
Source
CVE List V5
Source checked
Oct 31, 2026
References
1 linked source
Open source record