CVE-2013-1956: The create_user_ns function in kernel/user_namespace.c in the Linux kernel before 3.8.6 does not check whet...

Security readout for executives and security teams

This is an old Linux kernel flaw where a local user could bypass intended filesystem limits around chroot when creating a user namespace. It does not indicate remote compromise by itself. Business urgency depends on whether any systems still run pre-3.8.6-era kernels or vendor kernels without the corresponding fix. Exposure is most plausible on legacy Linux systems with kernels before 3.8.6 or vendor kernels missing the referenced backport. Risk is higher where untrusted local users, shared shell access, containers, or chroot-based restrictions are present. Treat this as a legacy exposure cleanup item unless vulnerable kernels are still deployed in multi-user or isolation-sensitive environments. It deserves prompt remediation where chroot or local user boundaries matter, but the provided evidence does not support emergency remote-compromise handling. Mitigation focus: Upgrade affected Linux kernels to 3.8.6 or a vendor-supported fixed build.; Verify vendor backports include commit 3151527ee007b73a0ebd296010f1c0454a919c7d.; Prioritize systems exposing local accounts, chroot restrictions, or user namespace functionality..

Prepared

Jun 14, 2026, 22:07 UTC (UTC+00:00)

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