Provide references for CVE-2019-6978.
Where can I find more information about CVE-2019-6978?
References are available at: https://github.com/php/php-src/commit/089f7c0bc28d399b0420aa6ef058e4c1c120b2ae, https://usn.ubuntu.com/3900-1/, https://lists.debian.org/debian-lts-announce/2019/01/msg00028.html, https://github.com/libgd/libgd/issues/492, https://www.debian.org/security/2019/dsa-4384, https://github.com/libgd/libgd/commit/553702980ae89c83f2d6e254d62cf82e204956d0, https://security.gentoo.org/glsa/201903-18, http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00025.html, http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00031.html, https://access.redhat.com/errata/RHSA-2019:2722, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEYUUOW75YD3DENIPYMO263E6NL2NFHI/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3WRUPZVT2MWFUEMVGTRAGDOBHLNMGK5R/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TTXSLRZI5BCQT3H5KALG3DHUWUMNPDX2/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3CZ2QADQTKRHTGB2AHD7J4QQNDLBEMM6/.