inftrees.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic.
https://www.oracle.com/security-alerts/cpujul2020.html
https://wiki.mozilla.org/images/0/09/Zlib-report.pdf
https://wiki.mozilla.org/MOSS/Secure_Open_Source/Completed#zlib
https://usn.ubuntu.com/4292-1/
https://usn.ubuntu.com/4246-1/
https://support.apple.com/HT208144
https://support.apple.com/HT208115
https://support.apple.com/HT208113
https://support.apple.com/HT208112
https://security.gentoo.org/glsa/202007-54
https://security.gentoo.org/glsa/201701-56
https://lists.debian.org/debian-lts-announce/2020/01/msg00030.html
https://lists.debian.org/debian-lts-announce/2019/03/msg00027.html
https://github.com/madler/zlib/commit/6a043145ca6e9c55184013841a67b2fef87e44c0
https://bugzilla.redhat.com/show_bug.cgi?id=1402345
https://access.redhat.com/errata/RHSA-2017:3453
https://access.redhat.com/errata/RHSA-2017:3047
https://access.redhat.com/errata/RHSA-2017:3046
https://access.redhat.com/errata/RHSA-2017:2999
https://access.redhat.com/errata/RHSA-2017:1222
https://access.redhat.com/errata/RHSA-2017:1221
https://access.redhat.com/errata/RHSA-2017:1220
http://www.securitytracker.com/id/1039427
http://www.securityfocus.com/bid/95131
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.openwall.com/lists/oss-security/2016/12/05/21
http://lists.opensuse.org/opensuse-updates/2017-01/msg00053.html
http://lists.opensuse.org/opensuse-updates/2017-01/msg00050.html
http://lists.opensuse.org/opensuse-updates/2016-12/msg00127.html