Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Linux kernel 访问控制错误漏洞
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。 Linux kernel 4.19.7之前版本中userfaultfd的实现存在安全漏洞，该漏洞源于程序没有正确地处理对UFFDIO_ ioctl调用的访问控制。本地攻击者可利用该漏洞写入数据。
CVSS Information
N/A
Vulnerability Type
N/A