Provide references for CVE-2021-3155.
Where can I find more information about CVE-2021-3155?
References are available at: https://ubuntu.com/security/notices/USN-5292-1, https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85, https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca.