SUSE-SU-2021:2803-1

This update for spice-vdagent fixes the following issues:

• CVE-2020-25650: memory DoS via arbitrary entries in active_xfers hash table (bsc#1177780)
• CVE-2020-25651: possible file transfer DoS and information leak via active_xfers hash map (bsc#1177781)
• CVE-2020-25652: possibility to exhaust file descriptors in vdagentd (bsc#1177782)
• CVE-2020-25653: UNIX domain socket peer PID retrieved via SO_PEERCRED is subject to race condition (bsc#1177783)