NULL pointer dereference in onnx - CVE-2026-44512
Published: July 3, 2026
Vulnerability identifier: #VU136856
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-44512
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Open Neural Network Exchange
Affected software:
onnx
onnx
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a null pointer dereference in Upsample_6_7::adapt_upsample_6_7() when processing a crafted model with an Upsample node that has zero inputs during version conversion. A remote attacker can trick the victim into opening a crafted model to cause a denial of service.
Debug builds abort with an assertion failure, while release builds crash with SIGSEGV.
How to mitigate CVE-2026-44512
Install security update from vendor's website.