CVE-2026-3888: Important Snap Flaw Enables Local Privilege Escalation to Root
2026-03-17T20:52:06Z•060594ba9824a8a409301af487d4e50e6ba2f8be65e157c927d5def746244038
AppArmorCISA-CVIECVE-2026-3888CrackArmorLPEUbuntu-24.04VMDRcontainer-escapekernellocal-privilege-escalationmicrosoft-patch-tuesdaypatchingqualyssnap-confinesystemd-tmpfilesvulnerability-management
What happened
Qualys published multiple security advisories and product updates. Most notably: CVE-2026-3888 — a local privilege escalation (LPE) in snap-confine interacting with systemd-tmpfiles affecting default Ubuntu Desktop 24.04+ installs and allowing unprivileged users to escalate to root. Qualys also disclosed “CrackArmor,” critical AppArmor confused-deputy vulnerabilities that enable kernel bypass, root escalation and container isolation breaks (widespread, present since ~2017); immediate kernel patching is recommended. Additional posts cover Microsoft Patch Tuesday (March 2026) fixes, Qualys VMDR/
Why it matters
A reviewed impact interpretation has not been published for this record.
Evidence and limitations
- Source ID
- qualys_blog
- Record identifier
- 060594ba9824a8a409301af487d4e50e6ba2f8be65e157c927d5def746244038
- Enrichment time
- 2026-03-17T20:52:06Z
- AI-assisted enrichment
- Yes
This record may overlap with other records. Its enrichment can be incomplete or wrong, and machine assistance was used. Validate consequential decisions against the linked source and your own environment.