CVE:CVE-2018-20784
CNNVD:CNNVD-201902-826
Linux kernel是美国Linux基金会的发布的开源操作系统Linux所使用的内核。
Linux kernel 4.20.2之前版本中存在安全漏洞。远程攻击者可利用该漏洞造成拒绝服务（‘update_blocked_averages’函数无限循环）。
solution:Upgrade linux linux_kernel to a higher version than 4.14.93,4.19.15,4.20.2,5.0:rc1,and avoid the version [4.13,4.14.93),[4.19,4.19.15),[4.20,4.20.2),5.0:rc1; Upgrade canonical ubuntu_linux to a higher version than 14.04,16.04,18.04,and avoid the version 14.04,16.04,18.04; Upgrade redhat enterprise_linux to a higher version than 8.0,and avoid the version 8.0; Upgrade redhat enterprise_linux_for_real_time to a higher version than 8,and avoid the version 8