"OpenConnect has a buffer overflow, causing a denial of service (application crash) or possibly unspecified other impact, via crafted certificate data to
get_cert_name in gnutls.c."
This has already been applied in Gentoo and stabilisation is done as part of bug 719108.
This issue was resolved and addressed in
GLSA 202006-15 at https://security.gentoo.org/glsa/202006-15
by GLSA coordinator Aaron Bauman (b-man).