CVE-2014-5207: fs/namespace.c in the Linux kernel through 3.16.1 does not properly restrict clearing MNT_NODEV, MNT_NOSUID...

Security readout for executives and security teams

CVE-2014-5207 is a Linux kernel flaw where a local user could weaken mount protections on bind mounts from inside a user namespace. On affected systems, this can support privilege escalation, disrupt auditing or backups, or cause filesystem activity that leads to denial of service. Exposure is most relevant on Linux systems running kernels through 3.16.1, especially where untrusted local users, shell access, shared hosting, or container-like user namespaces are enabled. Treat this as a high-priority legacy Linux exposure where local access exists. It is not a remote unauthenticated issue, but public exploit references and privilege-escalation impact justify prompt patch verification. Mitigation focus: Upgrade to a vendor kernel containing the upstream Linux fix.; Review Ubuntu or other distribution advisories for backported package versions.; Prioritize systems allowing untrusted local users or user namespaces..

Prepared

Jun 14, 2026, 07:14 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.