Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The mountpoint_last function in fs/namei.c in the Linux kernel before 3.15.8 does not properly maintain a certain reference count during attempts to use the umount system call in conjunction with a symlink, which allows local users to cause a denial of service (memory consumption or use-after-free) or possibly have unspecified other impact via the umount program.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Linux kernel 后置链接漏洞
Vulnerability Description
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。NFSv4 implementation是其中的一个分布式文件系统协议。 Linux kernel 3.15.7及之前版本的fs/namei.c文件中的‘mountpoint_last’函数存在安全漏洞，该漏洞源于程序使用与结合符号链接相结合的umount系统调用时，没有正确维护引用计数。本地攻击者可通过umount程序利用该漏洞造成拒绝服务（内存消耗或释放后重用）。
CVSS Information
N/A
Vulnerability Type
N/A