Cve-2026-3888 — CraftedSignal Threat Feed

Potential snap-confine Privilege Escalation via CVE-2026-3888

hello@craftedsignal.io — Fri, 20 Mar 2026 08:34:17 +0000

CVE-2026-3888 is a local privilege escalation vulnerability affecting Ubuntu systems using snap-confine. The vulnerability exists because systemd-tmpfiles may delete the /tmp/.snap directory, which is normally created by root. An unprivileged user can then recreate this directory and populate it with attacker-controlled files. The snap-confine utility, during subsequent snap sandbox initialization, may then bind-mount or trust these attacker-controlled paths. This can lead to the manipulation…

Ubuntu 24.04 Snapd Local Privilege Escalation (CVE-2026-3888)

hello@craftedsignal.io — Thu, 19 Mar 2026 00:38:41 +0000

A local privilege escalation vulnerability, identified as CVE-2026-3888, affects Ubuntu 24.04 installations due to a flaw within the snapd service. This vulnerability allows a malicious local user to gain root privileges on a vulnerable system. The Qualys Research Team discovered and reported the vulnerability on March 17, 2026. Defenders should prioritize patching vulnerable systems to prevent potential exploitation. The vulnerability’s impact is significant, as successful exploitation grants…