CVE-2026-8933

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.

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Produits concernés

• Canonical Ubuntu 26.04 LTS
• Canonical Ubuntu 24.04 LTS
• Canonical Ubuntu 22.04 LTS

Scores CVSS

Faiblesses (CWE)

• CWE-250

Références

• https://ubuntu.com/security/CVE-2026-8933

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories