CVE-2013-1959: kernel/user_namespace.c in the Linux kernel before 3.8.9 does not have appropriate capability requirements...

Security readout for executives and security teams

This is a Linux kernel local privilege escalation issue. A person or process already on a vulnerable machine could abuse weak permission checks around user namespace ID mapping files to gain higher privileges. It is not described as remote exploitation, but it matters where untrusted users, shared hosts, or exposed services can execute local code. Exposure is mainly legacy Linux systems running kernels before 3.8.9, or vendor kernels missing the equivalent backported fixes. Risk is higher on multi-user systems, shared hosting, build workers, or servers where an attacker may first obtain low-privileged code execution. Treat this as a legacy Linux privilege-escalation cleanup item with high priority on shared or exposed systems. It is not proven actively exploited in the supplied sources, but local privilege escalation can turn a limited compromise into full host control. Mitigation focus: Upgrade to Linux kernel 3.8.9 or a vendor kernel containing the upstream fixes.; Check distribution advisories for backported fixes on supported enterprise kernels.; Reduce or remove untrusted local shell access on vulnerable systems..

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.