Provide references for CVE-2021-21261.
Where can I find more information about CVE-2021-21261?
References are available at: https://github.com/flatpak/flatpak/security/advisories/GHSA-4ppf-fxf6-vxg2, https://github.com/flatpak/flatpak/releases/tag/1.8.5, https://www.debian.org/security/2021/dsa-4830, https://github.com/flatpak/flatpak/commit/6d1773d2a54dde9b099043f07a2094a4f1c2f486, https://github.com/flatpak/flatpak/commit/6e5ae7a109cdfa9735ea7ccbd8cb79f9e8d3ae8b, https://github.com/flatpak/flatpak/commit/aeb6a7ab0abaac4a8f4ad98b3df476d9de6b8bd4, https://github.com/flatpak/flatpak/commit/cc1401043c075268ecc652eac557ef8076b5eaba, https://security.gentoo.org/glsa/202101-21.