CVE:CVE-2018-7995
CNNVD:CNNVD-201803-324
Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。
Linux kernel 4.15.7及之前版本中的arch/x86/kernel/cpu/mcheck/mce.c文件的‘store_int_with_restart()’函数存在竞争条件漏洞。本地攻击者可通过向/sys/devices/system/machinecheck/machinecheck<cpu number>目录下的check_interval文件写入值利用该漏洞造成拒绝服务（内核错误和内核挂起）。
solution:Upgrade linux linux_kernel to a higher version than 4.15.7,and avoid the version (,4.15.7]; Upgrade canonical ubuntu_linux to a higher version than 14.04,16.04,and avoid the version 14.04,16.04; Upgrade debian debian_linux to a higher version than 7.0,and avoid the version 7.0