جزئیات آسیب‌پذیری

Local privilege escalation in snapd on Linux allows local attackers to get root privilege by re-creating snap's private /tmp directory when systemd-tmpfiles is configured to automatically clean up this directory. This issue affects Ubuntu 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, and 24.04 LTS.

• https://ubuntu.com/security/CVE-2026-3888 vdb-entryissue-tracking
• https://ubuntu.com/security/notices/USN-8102-1 vendor-advisory
• https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888 technical-descriptionvendor-advisory
• https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root technical-descriptionmedia-coverage
• https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt technical-descriptionmedia-coverage
• http://www.openwall.com/lists/oss-security/2026/03/18/1