CVE-2016-1576: The overlayfs implementation in the Linux kernel through 4.5.2 does not properly restrict the mount namespa...

Security readout for executives and security teams

CVE-2016-1576 is a local Linux kernel privilege escalation in overlayfs. A person who already has local access could abuse overlayfs over FUSE handling to gain higher privileges. It is not described as remotely exploitable, and the provided sources do not show active exploitation. Exposure is most relevant to Linux systems running kernel versions through 4.5.2 where overlayfs, FUSE, and local user or container-like namespace access are available. The affected-product metadata is incomplete, so confirm exposure against vendor kernel advisories. Prioritize remediation on multi-user Linux servers, container hosts, shared build systems, and legacy Ubuntu or custom-kernel environments. This is a local issue, but successful exploitation can convert limited access into elevated privileges. Mitigation focus: Update affected Linux kernels using vendor-supported packages or advisories.; Confirm the overlayfs fixes for sxid handling and nosuid propagation are present.; Review vendor guidance before applying nonstandard kernel or namespace restrictions..

Prepared

Jun 13, 2026, 14:44 UTC (UTC+00:00)

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