CVE-2026-44512

Name	CVE-2026-44512
Description	Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. From 1.9.0 before 1.22.0, onnx.version_converter.convert_version() can dereference a null pointer in Upsample_6_7::adapt_upsample_6_7() in onnx/version_converter/adapters/upsample_6_7.h when processing an untrusted model with an Upsample node that has zero inputs, causing an unrecoverable denial of service. This issue is fixed in version 1.22.0.
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)
Debian Bugs	1142281

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
onnx (PTS)	bullseye	1.7.0+dfsg-3	vulnerable
	bookworm	1.12.0-2	vulnerable
	trixie	1.17.0-3	vulnerable
	forky, sid	1.20.0-6	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
onnx	source	(unstable)	(unfixed)			1142281

Notes

[trixie] - onnx <no-dsa> (Minor issue)
https://github.com/onnx/onnx/security/advisories/GHSA-hwpq-hmq9-wj77
https://github.com/onnx/onnx/pull/7813
Fixed by: https://github.com/onnx/onnx/commit/cd310408165ad47c3cd7eb2b86cb5b80aa2e4fdf (v1.22.0)