CVE-2026-8933 – snap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment Setup

CVE ID :CVE-2026-8933

Published : July 21, 2026, 3:16 p.m. | 28 minutes ago

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.

Severity: 7.8 | HIGH

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