The issue is related to multiple vulnerabilities in the kdenetwork package, which can lead to a disruption of confidentiality, integrity, and availability of protected information. These vulnerabilities can be exploited remotely by an attacker who has passed the authentication procedure. The vulnerabilities are associated with various components of the kdenetwork package, including kdenetwork-kopete-devel, kdenetwork-kopete, kdenetwork-krdc, kdenetwork-kget-libs, kdenetwork-krfb-libs, kdenetwork-kdnssd, kdenetwork-fileshare-samba, kdenetwork-devel, kdenetwork-common, kdenetwork-krdc-devel, kdenetwork-kget, kdenetwork-krdc-libs, kdenetwork-kopete-libs, kdenetwork-krfb, and kdenetwork-debuginfo. The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer 0.9.9 and earlier does not properly handle attempts to send a large amount of ClientCutText data, which allows remote attackers to cause a denial of service (memory consumption or daemon crash) via a crafted message that is processed by using a single unchecked malloc.