Provide references for CVE-2021-29421.
Where can I find more information about CVE-2021-29421?
References are available at: https://github.com/pikepdf/pikepdf/commit/3f38f73218e5e782fe411ccbb3b44a793c0b343a, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QFLBBYGEDNXJ7FS6PIWTVI4T4BUPGEQ/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36P4HTLBJPO524WMQWW57N3QRF4RFSJG/, https://github.com/pikepdf/pikepdf/blob/v2.10.0/docs/release_notes.rst#v2100.