CVE-2026-8933
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
Vulnerability in snap-confine (snapd component). A local unprivileged attacker can escalate privileges to root by bypassing security restrictions in set-capabilities configuration.
Risk Assessment
Risk of full system compromise by a local user, potentially leading to unauthorized access and control.
Recommendation
Update snapd to a patched version or change snap-confine configuration to standard set-uid-root.
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Original NVD description (English source)
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.

