In kdeconnect-kde (aka KDE Connect) before 20.08.2, an attacker on the local network could send crafted packets that trigger use of large amounts of CPU, memory, or network connection slots, aka a Denial of Service attack.
https://security.gentoo.org/glsa/202101-16
https://lists.opensuse.org/opensuse-security-announce/2020-10/msg00014.html
https://kdeconnect.kde.org/official/
https://kde.org/info/security/advisory-20201002-1.txt
https://github.com/KDE/kdeconnect-kde/releases
https://github.com/KDE/kdeconnect-kde/commit/ce0f00fc2d3eccb51d0af4eba61a4f60de086a59
https://github.com/KDE/kdeconnect-kde/commit/8112729eb0f13e6947984416118531078e65580d
https://github.com/KDE/kdeconnect-kde/commit/613899be24b6e2a6b3e5cc719efce8ae8a122991
https://github.com/KDE/kdeconnect-kde/commit/542d94a70c56aa386c8d4d793481ce181b0422e8
https://github.com/KDE/kdeconnect-kde/commit/4fbd01a3d44a0bcca888c49a77ec7cfd10e113d7
https://github.com/KDE/kdeconnect-kde/commit/024e5f23db8d8ad3449714b906b46094baaffb89
https://bugzilla.suse.com/show_bug.cgi?id=1176268
http://www.openwall.com/lists/oss-security/2020/11/30/1
http://www.openwall.com/lists/oss-security/2020/10/14/1
http://www.openwall.com/lists/oss-security/2020/10/13/5
http://www.openwall.com/lists/oss-security/2020/10/13/4
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00016.html