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

CVE-2026-8933

Downstream

USN-8579-1

Related

USN-8579-1

Published

2026-07-21T14:00:00Z

Modified

2026-07-21T23:00:19.143505422Z

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

0Unknown 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

{
    "binaries": [
        {
            "binary_version": "2.76+ubuntu22.04.1",
            "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"
        }
    ],
    "priority_reason": "Local Privilege Escalation",
    "availability": "No subscription required"
}

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

0Unknown 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

{
    "binaries": [
        {
            "binary_version": "2.76+ubuntu24.04.1",
            "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"
        }
    ],
    "priority_reason": "Local Privilege Escalation",
    "availability": "No subscription required"
}

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

0Unknown 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

{
    "binaries": [
        {
            "binary_version": "2.76+ubuntu26.04.3",
            "binary_name": "golang-github-snapcore-snapd-dev"
        },
        {
            "binary_version": "2.76+ubuntu26.04.3",
            "binary_name": "snapd"
        }
    ],
    "priority_reason": "Local Privilege Escalation",
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8933.json"