CVE:CVE-2018-6555
CNNVD:CNNVD-201809-122
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 4.17之前版本中的net/irda/af_irda.c文件和drivers/staging/irda/net/af_irda.c文件的‘irda_setsockopt’函数存在安全漏洞。本地攻击者可借助AF_IRDA套接字利用该漏洞造成拒绝服务（ias_object释放后重用和系统崩溃）。
solution:Upgrade linux linux_kernel to a higher version than 4.17,and avoid the version (,4.17); Upgrade canonical ubuntu_linux to a higher version than 12.04,14.04,16.04,18.04,and avoid the version 12.04,14.04,16.04,18.04; Upgrade debian debian_linux to a higher version than 8.0,9.0,and avoid the version 8.0,9.0