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
  • CVE-2026-3888
Downstream
Related
Published
2026-03-17T14:00:00Z
Modified
2026-04-27T18:57:18.955337Z
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@2.73+ubuntu22.04.1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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 

{
    "priority_reason": "Local Privilege Escalation",
    "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"
        }
    ]
}

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@2.73+ubuntu24.04.2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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 

{
    "priority_reason": "Local Privilege Escalation",
    "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"
        }
    ]
}

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@2.73+ubuntu25.10.1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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 

{
    "priority_reason": "Local Privilege Escalation",
    "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"
        }
    ]
}

Database specific

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

Package

Name
snapd
Purl
pkg:deb/ubuntu/snapd@2.74.1+ubuntu26.04.3?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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 

{
    "priority_reason": "Local Privilege Escalation",
    "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"
        }
    ]
}

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@2.61.4ubuntu0.16.04.1+esm2?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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 

{
    "priority_reason": "Local Privilege Escalation",
    "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"
        }
    ]
}

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@2.61.4ubuntu0.18.04.1+esm2?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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 

{
    "priority_reason": "Local Privilege Escalation",
    "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"
        }
    ]
}

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@2.67.1+20.04ubuntu1~esm1?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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 

{
    "priority_reason": "Local Privilege Escalation",
    "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"
        }
    ]
}

Database specific

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