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TI-2026-68941 Aliases CVE-2026-19029GHSA-52jg-q5cg-3x56

Heap over-read in HDF5 scale-offset filter crashes applications

Priority LOW 29CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.

Summary

HDF5 from The HDF Group before 2.2.0 contains a heap-based buffer over-read (CWE-125) in the scale-offset filter decoder H5Z__filter_scaleoffset. When the stored minimum bits equal the full datatype precision, the decoder copies more bytes from a compressed chunk than the chunk holds, because the size is taken from attacker-controlled filter parameters. An attacker with no privileges can crash an application by getting a user to open a crafted HDF5 file.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A heap-based buffer over-read in H5Z__filter_scaleoffset() in src/H5Zscaleoffset.c in HDF5 through 2.2.0 lets an attacker cause a denial of service (application crash) with a crafted HDF5 file. When the stored minimum bits equal the full precision of the datatype, the decoder copies d_nelmts * size bytes from the compressed chunk without checking that the chunk holds that many bytes. Both values come from attacker-controlled scale-offset filter parameters in the dataset's filter pipeline message.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00118 1st percentileScored 2026-11-07
Fix Fixed HDF5 (The HDF Group): 2.2.0Red Hat: 1 advisory

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 2.2.02.2.0Patch availableCNA
  • HDF5 VendorThe HDF Group Affected before 2.2.0 Fixed in 2.2.0 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

Red Hat fixes Red Hat Hardened Images in RHSA-2026:73539, released 2026-09-29. The sources list no fixed version for HDF5.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA HDF5 (The HDF Group) Fixed in 2.2.0

Red Hat 1 advisory

  • RHSA-2026:73539 Released 2026-09-29 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images hdf5-2.2.0-0.1.2.hum1@aarch64, hdf5-2.2.0-0.1.2.hum1@src, hdf5-2.2.0-0.1.2.hum1@x86_64 +18

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:73539

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-19029
  2. 2026-10-07 Alias added: GHSA-52jg-q5cg-3x56
  3. 2026-10-07 CISA SSVC decision points changed
  4. 2026-10-07 Priority changed: MEDIUM → LOW
  5. 2026-10-20 Fix available: RHSA-2026:73539 · Red Hat
  6. 2026-10-20 Fix available: Red Hat Hardened Images · Red Hat
  7. 2026-10-20 CVSS score added · Red Hat

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