CVE-2026-44919

OpenStack Ironic: Pre-Validation Checksum Calculation allows Denial of Service (DoS) via Infinite Block Devices

4.3 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

0.47%Up 0.5 points since May 14, 2026

What each source reports

CVE List Score used 4.3

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.

Record: CVE-2026-44919
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-696
Updated: 2026-11-02

EUVDEUVD-2026-30209 4.3

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.

Record: EUVD-2026-30209
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-4g73-w726-53h3 4.3

OpenStack Ironic: Pre-Validation Checksum Calculation allows Denial of Service (DoS) via Infinite Block Devices

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.

Record: GHSA-4g73-w726-53h3
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-696
Updated: 2026-11-02

NVD 4.3

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.

Record: CVE-2026-44919
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-696
Updated: 2026-11-02

OSV 4.3

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.

Record: CVE-2026-44919
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-696
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-44919 6.5

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.

Record: DEBIAN-CVE-2026-44919
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVGHSA-4g73-w726-53h3 4.3

OpenStack Ironic: Pre-Validation Checksum Calculation allows Denial of Service (DoS) via Infinite Block Devices

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.

Record: GHSA-4g73-w726-53h3
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-696
Updated: 2026-11-02

OSVPYSEC-2026-2524 4.3

OpenStack Ironic: Pre-Validation Checksum Calculation allows Denial of Service (DoS) via Infinite Block Devices

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.

Record: PYSEC-2026-2524
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-44919 4.3

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.

Record: UBUNTU-CVE-2026-44919
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

openstack ironic

Affected packages

Affected packages
Package	Affected	Fixed
`ironic` PyPI	through 36.0.0	None known
`ironic` Debian:12	before 1:21.4.4-0+deb12u1, plus listed versions 1:21.1.0-31:21.1.0-3+deb12u11:21.3.0-11:21.4.0-11:21.4.0-21:21.4.0-31:21.4.0-4	1:21.4.4-0+deb12u1
`ironic` Debian:13	before 1:29.0.5-0+deb13u1, plus listed versions 1:29.0.0-7	1:29.0.5-0+deb13u1
`ironic` Debian:14	before 1:35.0.1-3, plus listed versions 1:29.0.0-71:32.0.0-11:32.0.0-21:32.0.0-41:32.0.0-5 Show 7 moreShow less 1:32.0.0-61:32.0.0-71:34.0.0-11:35.0.0-11:35.0.0-21:35.0.1-11:35.0.1-2	1:35.0.1-3
`ironic` PyPI	through 36.0.0, plus listed versions 0.010.1.1010.1.710.1.810.1.9 Show 45 moreShow less 11.1.111.1.211.1.311.1.412.0.012.1.012.1.112.1.212.1.312.1.412.1.512.1.612.2.013.0.013.0.113.0.213.0.313.0.413.0.513.0.613.0.714.0.015.0.015.0.115.0.215.1.015.2.016.0.016.0.116.0.216.0.316.0.416.0.516.1.016.2.017.0.017.0.117.0.217.0.317.0.417.1.018.0.018.1.018.2.018.2.1	None known
`ironic` PyPI	through 36.0.0, plus listed versions 0.010.1.1010.1.710.1.810.1.9 Show 45 moreShow less 11.1.111.1.211.1.311.1.412.0.012.1.012.1.112.1.212.1.312.1.412.1.512.1.612.2.013.0.013.0.113.0.213.0.313.0.413.0.513.0.613.0.714.0.015.0.015.0.115.0.215.1.015.2.016.0.016.0.116.0.216.0.316.0.416.0.516.1.016.2.017.0.017.0.117.0.217.0.317.0.417.1.018.0.018.1.018.2.018.2.1	None known
`ironic` Ubuntu:16.04:LTS	All versions, plus listed versions 1:4.2.0-0ubuntu11:4.3.0-0ubuntu11:5.1.0-0ubuntu11:5.1.2-0ubuntu1	None known
`ironic` Ubuntu:18.04:LTS	All versions, plus listed versions 1:9.1.0-0ubuntu21:9.2.0-0ubuntu11:10.0.0-0ubuntu11:10.1.0-0ubuntu11:10.1.1-0ubuntu11:10.1.1-0ubuntu2	None known
`ironic` Ubuntu:20.04:LTS	All versions, plus listed versions 1:13.0.1-0ubuntu11:14.0.0~b1~git2019121713.76597ca93-0ubuntu11:14.0.0~b1~git2019121713.76597ca93-0ubuntu21:14.0.0-0ubuntu11:14.0.1~git2020032415.de2d907fc-0ubuntu11:14.0.1~git2020041013.af9e6ba90-0ubuntu21:15.0.0-0ubuntu0.20.04.1	None known
`ironic` Ubuntu:22.04:LTS	All versions, plus listed versions 1:18.2.0-0ubuntu11:18.2.0+git2021120910.cdc3b9538-0ubuntu11:19.0.0+git2022011216.7beadee46-0ubuntu11:20.0.0+git2022030313.4e6a3d52e-0ubuntu11:20.1.0-0ubuntu11:20.1.0-0ubuntu1.11:20.1.0-0ubuntu1.21:20.1.0-0ubuntu1.3	None known

Show 4 moreShow less

Affected packages
Package	Affected	Fixed
`ironic` Ubuntu:24.04:LTS	All versions, plus listed versions 1:23.0.0-0ubuntu31:23.1.0+git2024011916.a374a0c1-0ubuntu11:24.1.0-0ubuntu11:24.1.1-0ubuntu11:24.1.1-0ubuntu1.21:24.1.1-0ubuntu1.3	None known
`ironic` Ubuntu:25.10	All versions, plus listed versions 1:29.0.0-0ubuntu11:30.0.0+git2025070713.577833d78-0ubuntu11:30.0.0+git2025070713.577833d78-0ubuntu21:32.0.0-0ubuntu11:32.0.0-0ubuntu1.1	None known
`ironic` Ubuntu:26.10	All versions, plus listed versions 1:35.0.0-0ubuntu21:35.0.0-0ubuntu31:38.0.0+git20260818.101.f8e78b0-0ubuntu11:38.0.0+git2026091517.26c022f13-0ubuntu11:39.0.0-0ubuntu1	None known
`ironic` Ubuntu:26.04:LTS	All versions, plus listed versions 1:32.0.0-0ubuntu11:34.0.0-0ubuntu11:35.0.0-0ubuntu11:35.0.0-0ubuntu21:35.0.0-0ubuntu2.1	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-44919 is a medium vulnerability (CVSS 4.3) in Openstack Ironic, published May 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.47%, the 40th percentile. Fixed in ironic 1:21.4.4-0+deb12u1.

References

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This page doesn't list everything

Left out here: 131 versions. The JSON record has them.