UBUNTU-CVE-2026-8933

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Source
https://ubuntu.com/security/CVE-2026-8933
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8933.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-8933
Upstream
Downstream
Related
Published
2026-07-21T14:00:00Z
Modified
2026-07-29T10:19:02Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - high
Summary
[none]
Details

A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities (rather than standard set-uid-root installations). Due to a flaw in how privilege boundaries or security sandboxes are initialized when the binary runs under limited ambient capabilities, a local, unprivileged attacker can exploit this behavior to bypass intended restrictions and execute arbitrary code. Successful exploitation allows the local user to elevate their privileges to full root authority.

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
2.76+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
2.73+ubuntu22.04.1
2.74.1+ubuntu22.04.4
2.75.2+ubuntu22.04
2.76+ubuntu22.04

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.76+ubuntu22.04.1"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.76+ubuntu22.04.1"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.76+ubuntu22.04.1"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.76+ubuntu22.04.1"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.76+ubuntu22.04.1"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.76+ubuntu22.04.1"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.76+ubuntu22.04.1"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.76+ubuntu22.04.1"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.76+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-2026-8933.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
2.76+ubuntu24.04.1

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
2.73+ubuntu24.04.2
2.74.1+ubuntu24.04.4
2.75.2+ubuntu24.04
2.76+ubuntu24.04

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.76+ubuntu24.04.1"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.76+ubuntu24.04.1"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.76+ubuntu24.04.1"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.76+ubuntu24.04.1"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.76+ubuntu24.04.1"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.76+ubuntu24.04.1"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.76+ubuntu24.04.1"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.76+ubuntu24.04.1"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.76+ubuntu24.04.1"
        }
    ],
    "priority_reason": "Local Privilege Escalation"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8933.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
2.76+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
2.74.1+ubuntu26.04.3
2.74.1+ubuntu26.04.4
2.75.2+ubuntu26.04.2
2.76+ubuntu26.04.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.76+ubuntu26.04.3"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.76+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-2026-8933.json"