5.5

CVE-2026-44512: linuxfoundation onnx NULL Pointer Dereference

CVSS: 5.5v3.1MediumAnalyzed
AliasesGHSA-hwpq-hmq9-wj77PYSEC-2026-2689UBUNTU-CVE-2026-44512
Published 08-07-2026Last modified 09-07-2026
Open JSON

Vulnerability summary

CVE-2026-44512 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linuxfoundation onnx. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.19%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-6MMC-4WWW-2Q74

Timeline

  1. 08-07-2026
    PublishedVulnerability first disclosed.
  2. 09-07-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Onnx

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Chainguard1 product
  • nemo< 2.7.3-r11
Debian1 product
  • onnxAll versions (No fix recorded)
Linuxfoundation1 product
  • onnx≥ 1.9.0, < 1.22.0
Onnx1 product
  • onnx≥ 1.9.0, < 1.22.0
PyPI1 product
  • onnx≥ 1.9.0, < 1.22.0
Ubuntu1 product
  • onnxAll versions (No fix recorded)

6 vendors · 6 products

References

13 links
Show all 13 references