CVE-2026-86095

Name	CVE-2026-86095
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
netcdf (PTS)	bookworm	1:4.9.0-3	vulnerable
	trixie	1:4.9.3-1	vulnerable
	forky, sid	1:4.10.1-1	vulnerable
netcdf-parallel (PTS)	bookworm	1:4.9.0-1	vulnerable
	trixie	1:4.9.3-2	vulnerable
	forky, sid	1:4.10.1-2	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
netcdf	source	(unstable)	(unfixed)
netcdf-parallel	source	(unstable)	(unfixed)