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TI-2026-62472 Aliases CVE-2026-92627GHSA-q9w4-8jx2-6xc8

Heap Use-After-Free in H5T__conv_f_f

Priority LOW 21CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · None · Low
Fix status
Partial Red Hat: 1 fixed, 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00229 13th percentileScored 2026-11-07
Fix Partial HDF5 (The HDF Group): 1.14.2Red Hat: 1 advisoryRed Hat: 1 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
The HDF GroupHDF5before 1.14.21.14.2Patch availableCNA
  • HDF5 VendorThe HDF Group Affected before 1.14.2 Fixed in 1.14.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:hdfgroup:hdf5:*:*:*:*:*:*:*:*——The HDF Group
  • cpe:2.3:a:hdfgroup:hdf5:*:*:*:*:*:*:*:* Versions — — ·The HDF Group

Remediation

  • Fix · CNA HDF5 (The HDF Group) Fixed in 1.14.2

Red Hat 1 advisory

  • RHSA-2026:61630 Released 2026-08-31 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images hdf5-2.2.0-0.1.1.hum1@aarch64, hdf5-2.2.0-0.1.1.hum1@src, hdf5-2.2.0-0.1.1.hum1@x86_64 +18

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet: Fix deferred
Red Hat OpenStack Platform 13 (Queens)AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:61630

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-92627
  2. 2026-10-03 Alias added: GHSA-q9w4-8jx2-6xc8

References

Other 1

  • TI-2025-28698 hdf5 v1.14.6 was discovered to contain a heap buffer overflow via the H5Z__filter_scaleoffset function. CVSS 3.1HIGH 8.8
  • TI-2025-28697 hdf5 v1.14.6 was discovered to contain a heap buffer overflow via the H5VM_memcpyvv function. CVSS 3.1HIGH 8.8
  • TI-2020-13412 Buffer Overflow vulnerability in function H5S_close in H5S.c in HDF5 1.10.4 allows remote… CVSS 3.1HIGH 8.8
  • TI-2021-15413 Buffer Overflow vulnerability in HDFGroup hdf5-h5dump 1.12.0 through 1.13.0 allows… CVSS 3.1HIGH 7.5
  • TI-2026-26978 HDF5: H5T__conv_struct Use After Free CVSS 3.1HIGH 7.8
  • TI-2026-15548 HDF5 H5Pget_fill_value NULL Pointer Dereference via Malformed Fill Value Message CVSS 4.0HIGH 8.2
See all 150 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences