UBUNTU-CVE-2026-33747

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Source
https://ubuntu.com/security/CVE-2026-33747
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-33747
Upstream
Downstream
Related
Published
2026-04-22T00:00:00Z
Modified
2026-05-20T16:25:31.037270449Z
Severity
  • 8.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.

References

Affected packages

Ubuntu:22.04:LTS
docker.io-app

Package

Name
docker.io-app
Purl
pkg:deb/ubuntu/docker.io-app?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
29.1.3-0ubuntu3~22.04.2

Affected versions

20.*
20.10.25-0ubuntu1~22.04.1
20.10.25-0ubuntu1~22.04.2
24.*
24.0.5-0ubuntu1~22.04.1
24.0.7-0ubuntu2~22.04.1
26.*
26.1.3-0ubuntu1~22.04.1
27.*
27.5.1-0ubuntu3~22.04.1
27.5.1-0ubuntu3~22.04.2
28.*
28.2.2-0ubuntu1~22.04.1
29.*
29.1.3-0ubuntu3~22.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "29.1.3-0ubuntu3~22.04.2",
            "binary_name": "docker.io"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json"
Ubuntu:24.04:LTS
docker.io-app

Package

Name
docker.io-app
Purl
pkg:deb/ubuntu/docker.io-app?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
29.1.3-0ubuntu3~24.04.2

Affected versions

24.*
24.0.5-0ubuntu1
24.0.7-0ubuntu1
24.0.7-0ubuntu2
24.0.7-0ubuntu3
24.0.7-0ubuntu4
24.0.7-0ubuntu4.1
26.*
26.1.3-0ubuntu1~24.04.1
27.*
27.5.1-0ubuntu3~24.04.1
27.5.1-0ubuntu3~24.04.2
28.*
28.2.2-0ubuntu1~24.04.1
29.*
29.1.3-0ubuntu3~24.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "29.1.3-0ubuntu3~24.04.2",
            "binary_name": "docker.io"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json"
Ubuntu:25.10
docker.io

Package

Name
docker.io
Purl
pkg:deb/ubuntu/docker.io?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

26.*
26.1.5+dfsg1-9ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "26.1.5+dfsg1-9ubuntu1",
            "binary_name": "golang-github-docker-docker-dev"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json"
docker.io-app

Package

Name
docker.io-app
Purl
pkg:deb/ubuntu/docker.io-app?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

27.*
27.5.1-0ubuntu3
27.5.1-0ubuntu4
28.*
28.2.2-0ubuntu1
29.*
29.1.3-0ubuntu3~25.10.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "29.1.3-0ubuntu3~25.10.1",
            "binary_name": "docker.io"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json"
Ubuntu:26.04:LTS
docker.io

Package

Name
docker.io
Purl
pkg:deb/ubuntu/docker.io?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

26.*
26.1.5+dfsg1-9ubuntu1
27.*
27.5.1+dfsg4-1ubuntu1
27.5.1+dfsg4-2ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "27.5.1+dfsg4-2ubuntu1",
            "binary_name": "golang-github-docker-docker-dev"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json"
docker.io-app

Package

Name
docker.io-app
Purl
pkg:deb/ubuntu/docker.io-app?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
29.1.3-0ubuntu4.1

Affected versions

28.*
28.2.2-0ubuntu1
29.*
29.1.2-0ubuntu1
29.1.3-0ubuntu1
29.1.3-0ubuntu2
29.1.3-0ubuntu3
29.1.3-0ubuntu4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "29.1.3-0ubuntu4.1",
            "binary_name": "docker.io"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json"
Ubuntu:Pro:16.04:LTS
docker.io

Package

Name
docker.io
Purl
pkg:deb/ubuntu/docker.io?arch=source&distro=esm-infra%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.6.2~dfsg1-1ubuntu4
1.10.2-0ubuntu3
1.10.2-0ubuntu4
1.10.3-0ubuntu1
1.10.3-0ubuntu4
1.10.3-0ubuntu5
1.10.3-0ubuntu6
1.11.2-0ubuntu5~16.04
1.12.1-0ubuntu13~16.04.1
1.12.3-0ubuntu4~16.04.2
1.12.6-0ubuntu1~16.04.1
1.13.1-0ubuntu1~16.04.2
17.*
17.03.2-0ubuntu2~16.04.1
18.*
18.06.1-0ubuntu1~16.04.2
18.06.1-0ubuntu1.2~16.04.1
18.09.2-0ubuntu1~16.04.1
18.09.5-0ubuntu1~16.04.2
18.09.7-0ubuntu1~16.04.1
18.09.7-0ubuntu1~16.04.4
18.09.7-0ubuntu1~16.04.5
18.09.7-0ubuntu1~16.04.6
18.09.7-0ubuntu1~16.04.7
18.09.7-0ubuntu1~16.04.9+esm1
18.09.7-0ubuntu1~16.04.9+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "18.09.7-0ubuntu1~16.04.9+esm2",
            "binary_name": "docker.io"
        },
        {
            "binary_version": "18.09.7-0ubuntu1~16.04.9+esm2",
            "binary_name": "golang-docker-dev"
        },
        {
            "binary_version": "18.09.7-0ubuntu1~16.04.9+esm2",
            "binary_name": "golang-github-docker-docker-dev"
        },
        {
            "binary_version": "18.09.7-0ubuntu1~16.04.9+esm2",
            "binary_name": "vim-syntax-docker"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json"
Ubuntu:Pro:18.04:LTS
docker.io

Package

Name
docker.io
Purl
pkg:deb/ubuntu/docker.io?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.13.1-0ubuntu6
17.*
17.03.2-0ubuntu1
17.03.2-0ubuntu3
17.03.2-0ubuntu5
17.12.1-0ubuntu1
18.*
18.06.1-0ubuntu1~18.04.1
18.06.1-0ubuntu1.2~18.04.1
18.09.2-0ubuntu1~18.04.1
18.09.5-0ubuntu1~18.04.2
18.09.7-0ubuntu1~18.04.1
18.09.7-0ubuntu1~18.04.3
18.09.7-0ubuntu1~18.04.4
19.*
19.03.6-0ubuntu1~18.04.1
19.03.6-0ubuntu1~18.04.2
19.03.6-0ubuntu1~18.04.3
20.*
20.10.2-0ubuntu1~18.04.2
20.10.2-0ubuntu1~18.04.3
20.10.7-0ubuntu1~18.04.1
20.10.7-0ubuntu1~18.04.2
20.10.7-0ubuntu5~18.04.2
20.10.7-0ubuntu5~18.04.3
20.10.12-0ubuntu2~18.04.1
20.10.21-0ubuntu1~18.04.2
20.10.21-0ubuntu1~18.04.3
20.10.21-0ubuntu1~18.04.3+esm1
20.10.21-0ubuntu1~18.04.3+esm2
20.10.21-0ubuntu1~18.04.3+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "20.10.21-0ubuntu1~18.04.3+esm3",
            "binary_name": "docker.io"
        },
        {
            "binary_version": "20.10.21-0ubuntu1~18.04.3+esm3",
            "binary_name": "golang-docker-dev"
        },
        {
            "binary_version": "20.10.21-0ubuntu1~18.04.3+esm3",
            "binary_name": "golang-github-docker-docker-dev"
        },
        {
            "binary_version": "20.10.21-0ubuntu1~18.04.3+esm3",
            "binary_name": "vim-syntax-docker"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json"
Ubuntu:Pro:20.04:LTS
docker.io

Package

Name
docker.io
Purl
pkg:deb/ubuntu/docker.io?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

19.*
19.03.2-0ubuntu1
19.03.6-0ubuntu1
19.03.8-0ubuntu1
19.03.8-0ubuntu1.20.04
19.03.8-0ubuntu1.20.04.1
19.03.8-0ubuntu1.20.04.2
20.*
20.10.2-0ubuntu1~20.04.2
20.10.2-0ubuntu1~20.04.3
20.10.7-0ubuntu1~20.04.1
20.10.7-0ubuntu1~20.04.2
20.10.7-0ubuntu5~20.04.1
20.10.7-0ubuntu5~20.04.2
20.10.12-0ubuntu2~20.04.1
20.10.21-0ubuntu1~20.04.1
20.10.21-0ubuntu1~20.04.2
20.10.21-0ubuntu1~20.04.4
20.10.21-0ubuntu1~20.04.5
20.10.21-0ubuntu1~20.04.6
20.10.21-0ubuntu1~20.04.6+esm1
20.10.21-0ubuntu1~20.04.6+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "20.10.21-0ubuntu1~20.04.6+esm2",
            "binary_name": "golang-docker-dev"
        },
        {
            "binary_version": "20.10.21-0ubuntu1~20.04.6+esm2",
            "binary_name": "golang-github-docker-docker-dev"
        },
        {
            "binary_version": "20.10.21-0ubuntu1~20.04.6+esm2",
            "binary_name": "vim-syntax-docker"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json"
docker.io-app

Package

Name
docker.io-app
Purl
pkg:deb/ubuntu/docker.io-app?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
26.1.3-0ubuntu1~20.04.1+esm2

Affected versions

20.*
20.10.25-0ubuntu1~20.04.1
20.10.25-0ubuntu1~20.04.2
24.*
24.0.5-0ubuntu1~20.04.1
24.0.7-0ubuntu2~20.04.1
26.*
26.1.3-0ubuntu1~20.04.1
26.1.3-0ubuntu1~20.04.1+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "26.1.3-0ubuntu1~20.04.1+esm2",
            "binary_name": "docker.io"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json"
Ubuntu:Pro:22.04:LTS
docker.io

Package

Name
docker.io
Purl
pkg:deb/ubuntu/docker.io?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

20.*
20.10.7-0ubuntu5
20.10.7-0ubuntu7
20.10.12-0ubuntu1
20.10.12-0ubuntu2
20.10.12-0ubuntu3
20.10.12-0ubuntu3+gke1.24.1
20.10.12-0ubuntu4
20.10.21-0ubuntu1~22.04.2
20.10.21-0ubuntu1~22.04.3
20.10.21-0ubuntu1~22.04.5
20.10.21-0ubuntu1~22.04.6
20.10.21-0ubuntu1~22.04.7
20.10.21-0ubuntu1~22.04.7+esm1
20.10.21-0ubuntu1~22.04.7+esm2
20.10.21-0ubuntu1~22.04.8
20.10.21-0ubuntu1~22.04.8+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "20.10.21-0ubuntu1~22.04.8+esm1",
            "binary_name": "golang-docker-dev"
        },
        {
            "binary_version": "20.10.21-0ubuntu1~22.04.8+esm1",
            "binary_name": "golang-github-docker-docker-dev"
        },
        {
            "binary_version": "20.10.21-0ubuntu1~22.04.8+esm1",
            "binary_name": "vim-syntax-docker"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json"
Ubuntu:Pro:24.04:LTS
docker.io

Package

Name
docker.io
Purl
pkg:deb/ubuntu/docker.io?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

20.*
20.10.24+dfsg1-1ubuntu2
20.10.25+dfsg1-2ubuntu1
20.10.25+dfsg1-2ubuntu1+esm1
20.10.25+dfsg1-2ubuntu1+esm2
20.10.25+dfsg1-2ubuntu1.24.04.1
20.10.25+dfsg1-2ubuntu1.24.04.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "20.10.25+dfsg1-2ubuntu1.24.04.1+esm1",
            "binary_name": "golang-github-docker-docker-dev"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33747.json"