CVE:CVE-2018-19489
CNNVD:CNNVD-201811-732
QEMU（又名Quick Emulator）是法国程序员法布里斯-贝拉（Fabrice Bellard）所研发的一套模拟处理器软件。该软件具有速度快、跨平台等特点。
QEMU中的hw/9pfs/9p.c文件的‘v9fs_wstat’函数存在竞争条件漏洞。本地攻击者可利用该漏洞造成拒绝服务（QEMU进程崩溃）。
solution:Upgrade qemu qemu to a higher version than 3.0.0,3.1.0:rc0,3.1.0:rc1,3.1.0:rc2,and avoid the version (,3.0.0],3.1.0:rc0,3.1.0:rc1,3.1.0:rc2; Upgrade debian debian_linux to a higher version than 8.0,9.0,and avoid the version 8.0,9.0; Upgrade fedoraproject fedora to a higher version than 29,and avoid the version 29; Upgrade canonical ubuntu_linux to a higher version than 14.04,16.04,18.04,18.10,and avoid the version 14.04,16.04,18.04,18.10; Upgrade opensuse leap to a higher version than 42.3,and avoid the version 42.3