CVE-2026-86095

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

Published Sep 4, 2026 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Unidata netcdf-c through 4.10.1 Out-of-bounds Write via Oversized HDF5 Attribute Name
First Time appeared Unidata
Unidata netcdf
Weaknesses CWE-787
CPEs cpe:2.3:a:unidata:netcdf:*:*:*:*:*:*:*:*
Vendors & Products Unidata
Unidata netcdf
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 8, 2026, 5:45 PM
Reserved
Sep 4, 2026, 10:17 PM
Status
Deferred
Published
Sep 4, 2026, 11:18 PM
Modified
Sep 24, 2026, 8:43 PM