Integer overflow in onnx - #VU164356
Published: November 10, 2026
Vulnerability identifier: #VU164356
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to produce incorrect or negative inferred dimensions, compromising the integrity of shape-inference results.
The vulnerability exists due to unchecked signed integer arithmetic and narrowing of 64-bit dimensions to 32-bit integers in ONNX MathOpTwoIntegers() and Concat when performing shape inference. A remote attacker can supply a crafted model through a local library API or file boundary with overflowing Add, Sub, or Mul operations when data_prop=True, or oversized Concat dimensions or sums during ordinary shape inference, to produce incorrect dimension information.
Affected software
onnx
Remediation
Install security update from vendor's website.
onnx - update to 1.23.0