UBUNTU-CVE-2026-47766

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Source
https://ubuntu.com/security/CVE-2026-47766
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47766.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-47766
Upstream
Published
2026-08-14T17:18:00Z
Modified
2026-08-19T13:31:47Z
Severity
  • 5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

crun is an open source OCI Container Runtime fully written in C. Prior to version 1.28, crun's default device setup opens the container rootfs /dev directory without O_NOFOLLOW. If an OCI bundle contains rootfs/dev as a symlink and the bundle configuration does not mount /dev, crun follows that symlink and creates the default device nodes and stdio symlinks at the symlink target outside the container rootfs. In a local rootful crun replay, this created fixed device nodes and symlinks outside the rootfs before crun returned failure. A pre-existing file named ptmx in the target directory was also replaced by crun's forced ptmx -> pts/ptmx symlink. Version 1.28 fixes the issue.

References

Affected packages

Ubuntu:20.04:LTS / crun

Package

Name
crun
Purl
pkg:deb/ubuntu/crun?arch=source&distro=focal

Affected ranges

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

Affected versions

0.*
0.10.5+dfsg-1
0.10.6+dfsg-1
0.11+dfsg-1
0.12+dfsg-1
0.12.1+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "crun",
            "binary_version": "0.12.1+dfsg-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47766.json"

Ubuntu:22.04:LTS / crun

Package

Name
crun
Purl
pkg:deb/ubuntu/crun?arch=source&distro=jammy

Affected ranges

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

Affected versions

0.*
0.17+dfsg-1
0.17+dfsg-1.1
0.17+dfsg-1.1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "crun",
            "binary_version": "0.17+dfsg-1.1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47766.json"

Ubuntu:24.04:LTS / crun

Package

Name
crun
Purl
pkg:deb/ubuntu/crun?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.8.5-1
1.11-1
1.11.1-1
1.12-1
1.13-1
1.14-1
1.14.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "crun",
            "binary_version": "1.14.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47766.json"

Ubuntu:25.10 / crun

Package

Name
crun
Purl
pkg:deb/ubuntu/crun?arch=source&distro=questing

Affected ranges

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

Affected versions

1.*
1.20-1syncable1
1.21-1ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "crun",
            "binary_version": "1.21-1ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47766.json"

Ubuntu:26.04:LTS / crun

Package

Name
crun
Purl
pkg:deb/ubuntu/crun?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.21-1ubuntu2
1.21-1ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "crun",
            "binary_version": "1.21-1ubuntu3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47766.json"