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TI-2026-58896 Aliases CVE-2026-86095GHSA-mm3m-jp7w-cj3m

Unidata netcdf-c through 4.10.1 Out-of-bounds Write via Oversized HDF5 Attribute Name

Priority LOW 38CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

Unidata netcdf-c through 4.10.1 contains an out-of-bounds write vulnerability in NC4_HDF5_inq_attname() that copies HDF5 attribute names into a fixed 256-byte buffer without length validation. Attackers can craft HDF5 files with oversized attribute names to overflow the destination buffer, causing memory corruption and crashes when applications enumerate attribute names.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00184 8th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
NSF Unidatanetcdf-cup to 4.10.1—No fix listedCNA
  • netcdf-c VendorNSF Unidata Affected up to 4.10.1 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

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

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-86095
  2. 2026-10-03 Alias added: GHSA-mm3m-jp7w-cj3m

References

Other 2

  • TI-2025-13622 Stack-based buffer overflow in NSF Unidata NetCDF-C CVSS 3.0HIGH 7.8
  • TI-2025-13621 Heap-based buffer overflow in NSF Unidata NetCDF-C CVSS 3.0HIGH 7.8
  • TI-2025-13620 Stack-based buffer overflow in NSF Unidata NetCDF-C CVSS 3.0HIGH 7.8
  • TI-2025-13619 Integer overflow in NSF Unidata NetCDF-C CVSS 3.0HIGH 7.8
  • TI-2025-13618 Stack-based buffer overflow in NSF Unidata NetCDF-C CVSS 3.0HIGH 7.8

Sources

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