Denial of Service Vulnerability in Linux Kernel Mount Namespace Handling

CVE-2016-6213 · MEDIUM Severity

AV:L/AC:M/AU:N/C:N/I:N/A:C

fs/namespace.c in the Linux kernel before 4.9 does not restrict how many mounts may exist in a mount namespace, which allows local users to cause a denial of service (memory consumption and deadlock) via MS_BIND mount system calls, as demonstrated by a loop that triggers exponential growth in the number of mounts.

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