Use-After-Free Vulnerability in Linux Kernel's NFS41+ Subsystem

CVE-2018-16884

What is CVE-2018-16884?

A vulnerability exists within the NFS41+ subsystem of the Linux kernel, whereby shared mounts in different network namespaces can lead to incorrect back-channel IDs being utilized by the bc_svc_process() function. This flaw enables a malicious container user to potentially cause memory corruption in the host kernel, which may trigger a system panic. The nature of this vulnerability raises concerns about potential privilege escalation, although it cannot be conclusively determined.

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