CVE-2026-44512: Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability

Routine

MEDIUM 5.5WATCHLISTUPGRADE

CVE-2026-44512 is a medium-severity flaw (CVSS 5.5) affecting onnx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-476
Published	2026-07-08
Last modified	2026-07-13

Publisher (CNA): GitHub, Inc. · Vendor: linuxfoundation

Last updated 2026-07-13 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-08 20:16 UTCPublished CVE record published
2026-07-13 17:02 UTCUpdated Record last modified

linuxfoundation onnx UPGRADE

Affected: >= 1.9.0 and < 1.22.0

Fixed in: 1.22.0

Safe to downgrade to: a release before 1.9.0

1. Check installed version

apt-cache policy onnx || rpm -q onnx || onnx --version

2. UPGRADE to 1.22.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade onnx

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade onnx

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.9.0 (Debian / Ubuntu)

apt-cache madison onnx sudo apt install onnx=<VERSION_BEFORE_1.9.0> sudo apt-mark hold onnx

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list onnx sudo dnf downgrade onnx-<VERSION_BEFORE_1.9.0> sudo dnf versionlock add onnx

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-44512?

onnx: upgrade to 1.22.0. Exact commands for each OS are on this page.

Is CVE-2026-44512 being exploited?

CVE-2026-44512 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-44512 affect?

CVE-2026-44512 affects onnx. Severity is medium (CVSS 5.5). 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/v

How urgent is CVE-2026-44512?

Priority 31/100. Public exploit reference; On your watchlist

Related CVEs

CVE-2026-49114 HIGH 7.1 UPGRADE In ONNX before 1.21.0, the 'save_external_data' function builds the external-data file path from the model's e

References

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