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Fencer Vulns
high 7.8

CVE-2026-86095 json

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

published 2026-09-04 2 mo ago modified 2026-09-24 45 d ago also EUVD-2026-71788

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 8%
public exploits
0
none known

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.

Patch / fix

  • netcdf SLE Module for Package Hub 15 SP7 4.7.4-150600.15.5.1
  • netcdf-openmpi2 SLE Module for Package Hub 15 SP7 4.7.4-150600.15.5.1
  • netcdf-openmpi3 SLE Module for Package Hub 15 SP7 4.7.4-150600.15.5.1
  • netcdf-openmpi4 SLE Module for Package Hub 15 SP7 4.7.4-150600.15.5.1
  • netcdf_4_7_4-gnu-hpc SLE Module for Package Hub 15 SP7 4.7.4-150600.15.5.1
  • netcdf_4_7_4-gnu-mpich-hpc SLE Module for Package Hub 15 SP7 4.7.4-150600.15.5.1
  • netcdf_4_7_4-gnu-mvapich2-hpc SLE Module for Package Hub 15 SP7 4.7.4-150600.15.5.1
  • netcdf_4_7_4-gnu-openmpi2-hpc SLE Module for Package Hub 15 SP7 4.7.4-150600.15.5.1

suse advisories SUSE-SU-2026:4249-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-86095 updated cvss 7.8

netcdf: netcdf-c: Memory corruption and denial of service via oversized HDF5 attribute name

  • Red Hat Enterprise Linux AI (RHEL AI) 3 netcdf
    affected: no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 mo ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.5 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
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 4.0 8.5 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Unidata netcdf-c

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.