UBUNTU-CVE-2026-3888

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Source
https://ubuntu.com/security/CVE-2026-3888
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3888.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-3888
Upstream
Downstream
Related
Published
2026-03-17T14:00:00Z
Modified
2026-05-20T16:25:38Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - high
Summary
[none]
Details

Local privilege escalation in snapd on Linux allows local attackers to get root privilege by re-creating snap's private /tmp directory when systemd-tmpfiles is configured to automatically clean up this directory. This issue affects Ubuntu 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, and 24.04 LTS.

References

Affected packages

Ubuntu:22.04:LTS
snapd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.73+ubuntu22.04.1

Affected versions

2.*
2.53+21.10ubuntu1
2.54.2+22.04ubuntu1
2.54.2+22.04ubuntu2
2.54.2+22.04ubuntu3
2.54.3+git19.g868fc21+22.04
2.54.3+git26.g360067e+22.04
2.55.2+22.04
2.55.2+22.04.1
2.55.3+22.04
2.55.3+22.04ubuntu1
2.55.5+22.04
2.56.2+22.04ubuntu1
2.57.4+22.04
2.57.5+22.04
2.57.5+22.04ubuntu0.1
2.58+22.04
2.58+22.04.1
2.61.3+22.04
2.62+22.04
2.63+22.04
2.63+22.04ubuntu0.1
2.65.3+22.04
2.66.1+22.04
2.67.1+22.04
2.68.5+ubuntu22.04.1
2.71+ubuntu22.04
2.72+ubuntu22.04
2.73+ubuntu22.04

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.73+ubuntu22.04.1"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.73+ubuntu22.04.1"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.73+ubuntu22.04.1"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.73+ubuntu22.04.1"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.73+ubuntu22.04.1"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.73+ubuntu22.04.1"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.73+ubuntu22.04.1"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.73+ubuntu22.04.1"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.73+ubuntu22.04.1"
        }
    ],
    "priority_reason": "Local Privilege Escalation"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3888.json"
Ubuntu:24.04:LTS
snapd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.73+ubuntu24.04.2

Affected versions

2.*
2.60.4+23.10
2.61.3+24.04
2.62+24.04build1
2.63+24.04
2.63+24.04ubuntu0.1
2.63.1+24.04
2.65.3+24.04
2.66.1+24.04
2.67.1+24.04
2.68.5+ubuntu24.04.1
2.71+ubuntu24.04
2.72+ubuntu24.04
2.73+ubuntu24.04
2.73+ubuntu24.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.73+ubuntu24.04.2"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.73+ubuntu24.04.2"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.73+ubuntu24.04.2"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.73+ubuntu24.04.2"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.73+ubuntu24.04.2"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.73+ubuntu24.04.2"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.73+ubuntu24.04.2"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.73+ubuntu24.04.2"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.73+ubuntu24.04.2"
        }
    ],
    "priority_reason": "Local Privilege Escalation"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3888.json"
Ubuntu:25.10
snapd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.73+ubuntu25.10.1

Affected versions

2.*
2.67.1+25.04
2.68.5+ubuntu25.10.2
2.71+ubuntu25.10
2.71.1+ubuntu25.10.1
2.72+ubuntu25.10.2
2.73+ubuntu25.10

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.73+ubuntu25.10.1"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.73+ubuntu25.10.1"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.73+ubuntu25.10.1"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.73+ubuntu25.10.1"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.73+ubuntu25.10.1"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.73+ubuntu25.10.1"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.73+ubuntu25.10.1"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.73+ubuntu25.10.1"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.73+ubuntu25.10.1"
        }
    ],
    "priority_reason": "Local Privilege Escalation"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3888.json"
Ubuntu:26.04:LTS
snapd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.74.1+ubuntu26.04.3

Affected versions

2.*
2.71.1+ubuntu25.10.1
2.72+ubuntu26.04.1
2.73+ubuntu26.04.1
2.74+ubuntu26.04
2.74.1+ubuntu26.04

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.74.1+ubuntu26.04.3"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.74.1+ubuntu26.04.3"
        }
    ],
    "priority_reason": "Local Privilege Escalation"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3888.json"
Ubuntu:Pro:16.04:LTS
snapd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.61.4ubuntu0.16.04.1+esm2

Affected versions

1.*
1.9
1.9.1.1
1.9.2
2.*
2.0
2.0.1
2.0.2
2.0.3
2.0.5
2.0.8
2.0.9
2.0.10
2.11+0.16.04
2.12+0.16.04
2.13
2.14.2~16.04
2.15.2ubuntu1
2.16ubuntu3
2.17.1ubuntu1
2.20.1ubuntu1
2.21
2.22.2
2.22.3
2.22.6
2.23.1
2.24.1
2.25
2.26.10
2.27.5
2.28.5
2.29.4.2
2.32.3.2
2.32.9
2.33.1ubuntu2
2.34.2
2.34.2ubuntu0.1
2.37.4
2.37.4ubuntu0.1
2.38
2.39.2
2.39.2ubuntu0.2
2.40
2.42.1
2.45.1
2.45.1ubuntu0.2
2.46.1
2.47.1
2.48
2.48.3
2.54.3+16.04~esm2
2.54.3+16.04.0ubuntu0.1~esm3
2.54.3+16.04.0ubuntu0.1~esm4
2.54.3+16.04.0ubuntu0.1~esm5
2.54.3+16.04.0ubuntu0.1~esm6
2.61.4ubuntu0.16.04.1+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.61.4ubuntu0.16.04.1+esm2"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.61.4ubuntu0.16.04.1+esm2"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.61.4ubuntu0.16.04.1+esm2"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.61.4ubuntu0.16.04.1+esm2"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.61.4ubuntu0.16.04.1+esm2"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.61.4ubuntu0.16.04.1+esm2"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.61.4ubuntu0.16.04.1+esm2"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.61.4ubuntu0.16.04.1+esm2"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.61.4ubuntu0.16.04.1+esm2"
        }
    ],
    "priority_reason": "Local Privilege Escalation"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3888.json"
Ubuntu:Pro:18.04:LTS
snapd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.61.4ubuntu0.18.04.1+esm2

Affected versions

2.*
2.28.5+17.10
2.29.4.1+18.04
2.29.4.2+18.04
2.31.1+18.04
2.32+18.04~pre5
2.32+18.04~pre6
2.32+18.04
2.32.3.2+18.04
2.32.5+18.04
2.32.8+18.04
2.32.9+18.04
2.33.1+18.04ubuntu2
2.34.2+18.04
2.34.2+18.04.1
2.37.1+18.04
2.37.1.1+18.04
2.37.4+18.04
2.37.4+18.04.1
2.38+18.04
2.39.2+18.04
2.40+18.04
2.42.1+18.04
2.45.1+18.04
2.45.1+18.04.2
2.46.1+18.04
2.47.1+18.04
2.48+18.04
2.48.3+18.04
2.49.2+18.04
2.51.1+18.04
2.54.2+18.04ubuntu1
2.54.3+18.04
2.54.3+18.04.2ubuntu0.1
2.54.3+18.04.2ubuntu0.2
2.55.5+18.04
2.57.5+18.04
2.57.5+18.04ubuntu0.1
2.58+18.04
2.58+18.04.1
2.61.4ubuntu0.18.04.1+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.61.4ubuntu0.18.04.1+esm2"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.61.4ubuntu0.18.04.1+esm2"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.61.4ubuntu0.18.04.1+esm2"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.61.4ubuntu0.18.04.1+esm2"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.61.4ubuntu0.18.04.1+esm2"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.61.4ubuntu0.18.04.1+esm2"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.61.4ubuntu0.18.04.1+esm2"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.61.4ubuntu0.18.04.1+esm2"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.61.4ubuntu0.18.04.1+esm2"
        }
    ],
    "priority_reason": "Local Privilege Escalation"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3888.json"
Ubuntu:Pro:20.04:LTS
snapd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.67.1+20.04ubuntu1~esm1

Affected versions

2.*
2.41+19.10.1
2.42.1+20.04
2.43.3+git1.8109f8
2.44~pre1+20.04
2.44+20.04
2.44.2+20.04
2.44.3+20.04
2.45.1+20.04
2.45.1+20.04.2
2.46.1+20.04
2.47.1+20.04
2.48+20.04
2.48.3+20.04
2.49.2+20.04
2.51.1+20.04ubuntu2
2.54.2+20.04ubuntu2
2.54.3+20.04
2.54.3+20.04.1
2.54.3+20.04.1ubuntu0.1
2.54.3+20.04.1ubuntu0.2
2.54.3+20.04.1ubuntu0.3
2.55.5+20.04
2.57.5+20.04
2.57.5+20.04ubuntu0.1
2.58+20.04
2.58+20.04.1
2.61.3+20.04
2.62+20.04
2.63+20.04
2.63+20.04ubuntu0.1
2.65.3+20.04
2.66.1+20.04
2.67.1+20.04

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.67.1+20.04ubuntu1~esm1"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.67.1+20.04ubuntu1~esm1"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.67.1+20.04ubuntu1~esm1"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.67.1+20.04ubuntu1~esm1"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.67.1+20.04ubuntu1~esm1"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.67.1+20.04ubuntu1~esm1"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.67.1+20.04ubuntu1~esm1"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.67.1+20.04ubuntu1~esm1"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.67.1+20.04ubuntu1~esm1"
        }
    ],
    "priority_reason": "Local Privilege Escalation"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3888.json"