CVE-2026-3888

HIGH EPSS 30.1%
Published Mar 17, 20263mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Mar 17, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
7.8
Exploitability
1.1
Impact
6.0
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
30.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-268

Affected Products 5

VendorProductVersionRange
canonicalubuntu_linux16.04any
canonicalubuntu_linux18.04any
canonicalubuntu_linux20.04any
canonicalubuntu_linux22.04any
canonicalubuntu_linux24.04any

References 6

  • openwall.com http://www.openwall.com/lists/oss-security/2026/03/18/1
    Mailing ListThird Party Advisory
  • blog.qualys.com https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root
    MitigationThird Party Advisory
  • cdn2.qualys.com https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt
    Third Party Advisory
  • discourse.ubuntu.com https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888
    MitigationThird Party Advisory
  • ubuntu.com https://ubuntu.com/security/CVE-2026-3888
    Third Party Advisory
  • ubuntu.com https://ubuntu.com/security/notices/USN-8102-1
    Third Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.