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Vulnerabilities

Vulnerability · CVE-2026-3888

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 configu…

Published Mar 17, 2026 · catalog updated Jun 17, 2026 · ubuntu linux

Check if you run it

No confirmed exploitation is on record for CVE-2026-3888. EPSS is 0.47%. Act only if a listed version of ubuntu linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.47%
Remediation
Advisory link
Affected products
cpe canonical/ubuntu linux

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe canonical/ubuntu linux16.04
  • cpe canonical/ubuntu linux18.04
  • cpe canonical/ubuntu linux20.04
  • cpe canonical/ubuntu linux22.04
  • cpe canonical/ubuntu linux24.04

How to fix CVE-2026-3888

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-3888. EPSS is 0.47%. Act only if a listed version of ubuntu linux is installed.

Which versions are affected?

Compare what you have installed with canonical/ubuntu linux 16.04; canonical/ubuntu linux 18.04; canonical/ubuntu linux 20.04; canonical/ubuntu linux 22.04. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-268. EPSS 0.47%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Technology hubs

Ubuntu security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 17, 2026 · NIST NVD

    Detected

    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.

  2. Jun 17, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-3888

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-3888

    30-day exploitation probability 0.5%

    first.org
  • Metasploit ModulesPublic exploit moduleexploit_linux/local/cve_2026_3888

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2026-3888

    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 LT

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.