Gnome Pango 1.42 and later is affected by: Buffer Overflow. The impact is: The heap based buffer overflow can be used to get code execution. The component is: function name: pango_log2vis_get_embedding_levels, assignment of nchars and the loop condition. The attack vector is: Bug can be used when application pass invalid utf-8 strings to functions like pango_itemize.
https://access.redhat.com/errata/RHBA-2019:2824
https://access.redhat.com/errata/RHSA-2019:2571
https://access.redhat.com/errata/RHSA-2019:2582
https://access.redhat.com/errata/RHSA-2019:2594
https://access.redhat.com/errata/RHSA-2019:3234
https://gitlab.gnome.org/GNOME/pango/-/commits/main/pango/pango-bidi-type.c
https://gitlab.gnome.org/GNOME/pango/-/issues/342
https://seclists.org/bugtraq/2019/Aug/14
https://security.gentoo.org/glsa/201909-03
https://usn.ubuntu.com/4081-1/