CVE-2018-0501: Canonical Ubuntu Linux

Medium severity, CVSS 5.9. EPSS: 1% chance of exploitation in the next 30 days.

The mirror:// method implementation in Advanced Package Tool (APT) 1.6.x before 1.6.4 and 1.7.x before 1.7.0~alpha3 mishandles gpg signature verification for the InRelease file of a fallback mirror, aka mirrorfail.

Affected products

• Canonical Ubuntu Linux: version 18.04 only
• Debian Advanced Package Tool: from 1.6.0, before 1.6.4 (fixed in 1.6.4); version 1.7.0 only

Published 2018-08-21. Last modified 2026-06-17.