Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Linux kernel 安全漏洞
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 4.5.5之前版本的kernel/bpf/verifier.c文件中的‘replace_map_fd_with_map_ptr’函数存在安全漏洞，该漏洞源于程序没有正确维持fd数据结构体。本地攻击者可借助引用不正确文件描述符的BPF指令利用该漏洞获取权限或造成拒绝服务（释放后重用）。
CVSS Information
N/A
Vulnerability Type
N/A