CVE-2015-4177: The collect_mounts function in fs/namespace.c in the Linux kernel before 4.0.5 does not properly consider t...

Security readout for executives and security teams

CVE-2015-4177 is a Linux kernel flaw that can let a local user crash the system under specific namespace and unmount conditions. The public record describes denial of service, not data theft or remote code execution. Business urgency is highest for shared Linux servers, container hosts, and systems exposing local accounts. Exposure appears limited to Linux systems running affected pre-4.0.5 kernel code or vendor kernels without the relevant backport. Hosts with user namespaces, containers, or untrusted local users are the most relevant population. Treat as a medium operational-risk issue. It is not described as remote compromise, but crashes on shared or containerized infrastructure can affect availability and service commitments. Mitigation focus: Update to Linux kernel 4.0.5 or a vendor kernel containing the referenced fix.; Check distribution advisories for backported fixes before relying on version numbers alone.; Review whether unprivileged user namespaces are enabled and follow vendor hardening guidance..

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.