CVE-2026-44919 OpenStack Ironic: Pre-Validation Checksum Calculation allows Denial of Service (DoS) via Infinite Block Devices
An attacker can cause a denial of service in OpenStack Ironic by triggering an infinite loop during image checksum calculations using a specific URL.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-44919?
CVE-2026-44919 is a medium-severity denial of service vulnerability in OpenStack Ironic, published on 14 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In OpenStack Ironic through 35.x before a3f6d73, during image handling, an infinite loop in checksum calculations can occur via the file:///dev/zero URL.
Weakness: CWE-696
Which versions are affected by CVE-2026-44919?
3 open source packages ship an affected version, including ironic. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
ironic PyPI | All versions to 36.0.0 | None |
ironic PyPI | All versions to 36.0.0 | None |
ironic PyPI | All versions to 36.0.0 | None |
Products include Openstack Ironic.
How do I fix CVE-2026-44919?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-44919 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44919 exists.
Other vulnerabilities in OpenStack Ironic
- CVE-2026-42997 OpenStack Ironic has an Incorrect Resource Transfer Between Spheres
- CVE-2026-42510 OpenStack Ironic is Vulnerable to Inclusion of Functionality from Untrusted Control Sphere
- CVE-2015-7514 Information disclosure in n/a
- CVE-2026-48681 OpenStack Ironic allows file overwrite via directory traversal during deployment with a crafted ISO image
- CVE-2026-46447 OpenStack Ironic allows Boot Script Injection
Sources
Also known as DEBIAN-CVE-2026-44919, GHSA-4g73-w726-53h3, PYSEC-2026-2524, UBUNTU-CVE-2026-44919.