CVE-2026-86095
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
ProductUnidata Netcdf-c
PublishedSep 4, 2026
First seenSep 4, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Unidata netcdf-c | v ≤ 4.10.1 | — |
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