Critical privilege escalation vulnerability found in Ubuntu snap-confine

A high-severity local privilege escalation vulnerability, tracked as CVE-2026-8933, has been identified in the snap-confine component of Ubuntu’s snapd package. This flaw affects default installations of Ubuntu Desktop versions 24.04, 25.10, and 26.04 that utilize the set-capabilities model. The vulnerability stems from a race condition introduced during a recent security-hardening update, which inadvertently allows unprivileged users to gain root access. Source

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