CVE:CVE-2020-25596
CNNVD:CNNVD-202009-1328
Xen是英国剑桥大学的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。
Xen 4.14版本及之前版本中存在安全漏洞。攻击者可利用该漏洞通过SYSENTER的x86 pv guest虚拟机内核DoS。
solution:Upgrade xen xen to a higher version than 4.14.0,and avoid the version [3.2.0,4.14.0]; Upgrade fedoraproject fedora to a higher version than 31,32,33,and avoid the version 31,32,33; Upgrade debian debian_linux to a higher version than 10.0,and avoid the version 10.0; Upgrade opensuse leap to a higher version than 15.2,and avoid the version 15.2