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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00145.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
unaffected
Version Status Constraints
2.75.0 affected < 2.76.1
Canonical Ubuntu 26.04 LTS affected
Version Status Constraints
2.76+ubuntu26.04.3 unaffected —
Canonical Ubuntu 24.04 LTS affected
Version Status Constraints
2.76+ubuntu24.04.1 unaffected —
Canonical Ubuntu 22.04 LTS affected
Version Status Constraints
2.76+ubuntu22.04.1 unaffected —

No data.

No data.

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Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-8579-1 snapd vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://ubuntu.com/security/CVE-2026-8933 cve-icon
History

Thu, 23 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Canonical
Canonical ubuntu
Vendors & Products Canonical
Canonical ubuntu

Wed, 22 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 21 Jul 2026 14:45:00 +0000

Type Values Removed Values Added
Description 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.
Title snap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment Setup
Weaknesses CWE-250
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: canonical

Published:

Updated: 2026-07-22T18:28:05.924Z

Reserved: 2026-05-19T10:37:03.649Z

Link: CVE-2026-8933

cve-icon Vulnrichment

Updated: 2026-07-22T18:15:11.839Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-24T04:00:05Z

Weaknesses