CVE-2021-44730: Canonical Snapd

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

snapd 2.54.2 did not properly validate the location of the snap-confine binary. A local attacker who can hardlink this binary to another location to cause snap-confine to execute other arbitrary binaries and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1

Affected products

• Canonical Snapd: up to and including 2.54.2
• Canonical Ubuntu Linux: version 18.04 only; version 20.04 only; version 21.10 only
• Debian Debian Linux: version 10.0 only; version 11.0 only
• Fedoraproject Fedora: version 34 only; version 35 only

Published 2022-02-17. Last modified 2026-06-17.