CVE:CVE-2021-4009
CNNVD:CNNVD-202112-1128
xorg-x11-server是X.Org（X.org）基金会的一款X窗口系统显示服务器。
xorg-x11-server 存在缓冲区错误漏洞，该漏洞源于X.Org X服务器错误处理特定的输入。攻击者可利用该漏洞导致服务器崩溃，拒绝服务，或者可能执行任意代码并升级特权。
solution:Upgrade x.org x_server to a higher version than 1.20.14,21.1.0,21.1.1,and avoid the version (,1.20.14),21.1.0,21.1.1; Upgrade fedoraproject fedora to a higher version than 34,35,and avoid the version 34,35; Upgrade debian debian_linux to a higher version than 9.0,10.0,11.0,and avoid the version 9.0,10.0,11.0