Vulnerability: Privilege Escalation via MNT_DETACH in Linux Kernel

CVE-2014-9717 · LOW Severity

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

fs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 system calls without verifying that the MNT_LOCKED flag is unset, which allows local users to bypass intended access restrictions and navigate to filesystem locations beneath a mount by calling umount2 within a user namespace.

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