UBUNTU-CVE-2026-41684

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Source
https://ubuntu.com/security/CVE-2026-41684
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41684.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-41684
Upstream
  • CVE-2026-41684
Published
2026-05-07T14:16:00Z
Modified
2026-05-20T16:25:42.302958084Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Incus is a system container and virtual machine manager. Prior to version 7.0.0, backup.GetInfo() trusts the inline backup/index.yaml config when present and only falls back to parsing the legacy backup/container/backup.yaml file if result.Config == nil. As a result, an archive can carry a valid inline config that passes the initial import preflight while also carrying a malformed legacy backup/container/backup.yaml file that is reparsed later from the restored file system. ParseConfigYamlFile() accepts YAML documents with no container section, and multiple downstream consumers then dereference. Container without checking for nil. Confirmed examples in the instance restore and import flow include backup.UpdateInstanceConfig() and internalImportFromBackup(). An authenticated user with permission to import instance backups may be able to crash the Incus daemon with a crafted backup archive whose inline backup/index.yaml is valid but whose extracted legacy backup.yaml omits container. The crash occurs in the restore path after archive extraction has begun. This issue has been patched in version 7.0.0.

References

Affected packages

Ubuntu:20.04:LTS
lxd

Package

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

Affected ranges

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

Affected versions

1:0.*
1:0.7
1:0.8
1:0.9
1:0.10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "lxd",
            "binary_version": "1:0.10"
        },
        {
            "binary_name": "lxd-client",
            "binary_version": "1:0.10"
        },
        {
            "binary_name": "lxd-tools",
            "binary_version": "1:0.10"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41684.json"
Ubuntu:25.10
incus

Package

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

Affected ranges

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

Affected versions

6.*
6.0.3-4
6.0.4-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-lxc-incus-dev",
            "binary_version": "6.0.4-2"
        },
        {
            "binary_name": "incus",
            "binary_version": "6.0.4-2"
        },
        {
            "binary_name": "incus-agent",
            "binary_version": "6.0.4-2"
        },
        {
            "binary_name": "incus-base",
            "binary_version": "6.0.4-2"
        },
        {
            "binary_name": "incus-client",
            "binary_version": "6.0.4-2"
        },
        {
            "binary_name": "incus-extra",
            "binary_version": "6.0.4-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41684.json"
Ubuntu:26.04:LTS
incus

Package

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

Affected ranges

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

Affected versions

6.*
6.0.4-2
6.0.5-8

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-lxc-incus-dev",
            "binary_version": "6.0.5-8"
        },
        {
            "binary_name": "incus",
            "binary_version": "6.0.5-8"
        },
        {
            "binary_name": "incus-agent",
            "binary_version": "6.0.5-8"
        },
        {
            "binary_name": "incus-base",
            "binary_version": "6.0.5-8"
        },
        {
            "binary_name": "incus-client",
            "binary_version": "6.0.5-8"
        },
        {
            "binary_name": "incus-extra",
            "binary_version": "6.0.5-8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41684.json"
Ubuntu:Pro:16.04:LTS
lxd

Package

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

Affected ranges

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

Affected versions

0.*
0.20-0ubuntu4
0.21-0ubuntu3
0.21-0ubuntu5
0.22-0ubuntu1
0.22-0ubuntu2
0.23-0ubuntu1
0.23-0ubuntu2
0.23-0ubuntu3
0.24-0ubuntu2
0.24-0ubuntu3
0.24-0ubuntu4
0.25-0ubuntu1
0.26-0ubuntu2
0.26-0ubuntu3
0.27-0ubuntu1
0.27-0ubuntu2
2.*
2.0.0~beta1-0ubuntu3
2.0.0~beta1-0ubuntu4
2.0.0~beta2-0ubuntu1
2.0.0~beta2-0ubuntu2
2.0.0~beta3-0ubuntu1
2.0.0~beta3-0ubuntu2
2.0.0~beta3-0ubuntu3
2.0.0~beta3-0ubuntu4
2.0.0~beta4-0ubuntu1
2.0.0~beta4-0ubuntu2
2.0.0~beta4-0ubuntu3
2.0.0~beta4-0ubuntu4
2.0.0~beta4-0ubuntu5
2.0.0~beta4-0ubuntu6
2.0.0~beta4-0ubuntu7
2.0.0~rc1-0ubuntu1
2.0.0~rc1-0ubuntu2
2.0.0~rc1-0ubuntu3
2.0.0~rc2-0ubuntu2
2.0.0~rc2-0ubuntu3
2.0.0~rc3-0ubuntu1
2.0.0~rc3-0ubuntu2
2.0.0~rc3-0ubuntu3
2.0.0~rc3-0ubuntu4
2.0.0~rc4-0ubuntu1
2.0.0~rc5-0ubuntu1
2.0.0~rc6-0ubuntu1
2.0.0~rc6-0ubuntu2
2.0.0~rc7-0ubuntu1
2.0.0~rc7-0ubuntu2
2.0.0~rc8-0ubuntu1
2.0.0~rc8-0ubuntu2
2.0.0~rc8-0ubuntu3
2.0.0~rc8-0ubuntu5
2.0.0~rc8-0ubuntu6
2.0.0~rc8-0ubuntu7
2.0.0~rc9-0ubuntu2
2.0.0~rc9-0ubuntu3
2.0.0~rc9-0ubuntu4
2.0.0~rc9-0ubuntu5
2.0.0-0ubuntu1
2.0.0-0ubuntu2
2.0.0-0ubuntu3
2.0.0-0ubuntu4
2.0.1-0ubuntu1~16.04.1
2.0.2-0ubuntu1~16.04.1
2.0.3-0ubuntu1~ubuntu16.04.2
2.0.4-0ubuntu1~ubuntu16.04.1
2.0.5-0ubuntu1~ubuntu16.04.1
2.0.8-0ubuntu1~ubuntu16.04.1
2.0.8-0ubuntu1~ubuntu16.04.2
2.0.9-0ubuntu1~16.04.1
2.0.9-0ubuntu1~16.04.2
2.0.10-0ubuntu1~16.04.1
2.0.10-0ubuntu1~16.04.2
2.0.11-0ubuntu1~16.04.2
2.0.11-0ubuntu1~16.04.4
2.0.11-0ubuntu1~16.04.4+esm1
2.0.11-0ubuntu1~16.04.4+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-lxc-lxd-dev",
            "binary_version": "2.0.11-0ubuntu1~16.04.4+esm2"
        },
        {
            "binary_name": "lxc2",
            "binary_version": "2.0.11-0ubuntu1~16.04.4+esm2"
        },
        {
            "binary_name": "lxd",
            "binary_version": "2.0.11-0ubuntu1~16.04.4+esm2"
        },
        {
            "binary_name": "lxd-client",
            "binary_version": "2.0.11-0ubuntu1~16.04.4+esm2"
        },
        {
            "binary_name": "lxd-tools",
            "binary_version": "2.0.11-0ubuntu1~16.04.4+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41684.json"
Ubuntu:Pro:18.04:LTS
lxd

Package

Name
lxd
Purl
pkg:deb/ubuntu/lxd?arch=source&distro=esm-infra%2Fbionic

Affected ranges

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

Affected versions

2.*
2.18-0ubuntu6
2.19-0ubuntu1
2.20-0ubuntu3
2.20-0ubuntu4
2.21-0ubuntu1
2.21-0ubuntu2
2.21-0ubuntu3
2.21-0ubuntu4
3.*
3.0.0~beta2-0ubuntu3
3.0.0~beta3-0ubuntu3
3.0.0~beta5-0ubuntu2
3.0.0~beta7-0ubuntu1
3.0.0-0ubuntu1
3.0.0-0ubuntu2
3.0.0-0ubuntu3
3.0.0-0ubuntu4
3.0.1-0ubuntu1~18.04.1
3.0.2-0ubuntu1~18.04.1
3.0.3-0ubuntu1~18.04.1
3.0.3-0ubuntu1~18.04.2
3.0.3-0ubuntu1~18.04.2+esm1
3.0.3-0ubuntu1~18.04.2+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "lxd",
            "binary_version": "3.0.3-0ubuntu1~18.04.2+esm2"
        },
        {
            "binary_name": "lxd-client",
            "binary_version": "3.0.3-0ubuntu1~18.04.2+esm2"
        },
        {
            "binary_name": "lxd-tools",
            "binary_version": "3.0.3-0ubuntu1~18.04.2+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41684.json"
Ubuntu:Pro:24.04:LTS
incus

Package

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

Affected ranges

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

Affected versions

0.*
0.4-1ubuntu1
0.5.1-1
0.5.1-3
0.6-1
6.*
6.0.0-1
6.0.0-1ubuntu0.1
6.0.0-1ubuntu0.2
6.0.0-1ubuntu0.2+esm1
6.0.0-1ubuntu0.3
6.0.0-1ubuntu0.3+esm1
6.0.0-1ubuntu0.3+esm2
6.0.0-1ubuntu0.3+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-lxc-incus-dev",
            "binary_version": "6.0.0-1ubuntu0.3+esm3"
        },
        {
            "binary_name": "incus",
            "binary_version": "6.0.0-1ubuntu0.3+esm3"
        },
        {
            "binary_name": "incus-agent",
            "binary_version": "6.0.0-1ubuntu0.3+esm3"
        },
        {
            "binary_name": "incus-client",
            "binary_version": "6.0.0-1ubuntu0.3+esm3"
        },
        {
            "binary_name": "incus-migrate",
            "binary_version": "6.0.0-1ubuntu0.3+esm3"
        },
        {
            "binary_name": "incus-tools",
            "binary_version": "6.0.0-1ubuntu0.3+esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41684.json"