The upstream bug report describes this issue as follows:A vulnerability was found in GLib2.0, where DoS caused by handling a malicious text-form variant which is structured to cause looping superlinear to its text size. Applications are at risk if they parse untrusted text-form variants. The upstream bug report describes this issue as follows:A vulnerability was found in GLib2.0, where DoS caused by handling a malicious text-form variant which is structured to cause looping superlinear to its text size. Applications are at risk if they parse untrusted text-form variants. GLib's GVariant deserialization prior to GLib 2.74.4 failed to validate the input conforms to the expected format, leading to denial of service. GLib's GVariant deserialization prior to GLib 2.74.4 is vulnerable to a slowdown issue where a crafted GVariant can cause excessive processing, leading to denial of service. GLib's GVariant deserialization prior to GLib 2.74.4 is vulnerable to an exponential blowup issue where a crafted GVariant can cause excessive processing, leading to denial of service