Critical Snapd Vulnerabilities in Ubuntu Expose Local Privilege Escalation Risks

Multiple critical vulnerabilities in snapd were disclosed on July 21, 2026, affecting Ubuntu 22.04, 24.04, and 26.04 LTS: CVE-2024-5300 (local information disclosure via systemd-userdbd varlink), CVE-2026-8933 (privilege escalation via attacker-controlled files in privileged locations), and CVE-2026-15226 (execution of setuid binaries due to insecure seccomp template). Researchers from Qualys, James Henstridge, and Zygmunt Krynicki reported the issues; users are advised to update to patched snapd releases to mitigate risk and enforce least-privilege principles.