CVE-2013-1858: The clone system-call implementation in the Linux kernel before 3.8.3 does not properly handle a combinatio...

Security readout for executives and security teams

CVE-2013-1858 is a Linux kernel local privilege escalation flaw. A user already able to run code on a vulnerable host could abuse clone behavior involving user namespaces and filesystem sharing to gain higher privileges. This is not described as remotely exploitable in the provided sources. Exposure is most relevant to Linux systems running kernels before 3.8.3, especially where untrusted local users or workloads can execute processes. Distribution backports may change exposure, so package advisory status matters more than version strings alone. Prioritize remediation on shared Linux hosts, developer systems, and environments running untrusted workloads. This is a local flaw, so urgency depends on whether attackers can already execute code locally, but successful exploitation could turn limited access into privileged control. Mitigation focus: Upgrade to Linux kernel 3.8.3 or a vendor-fixed kernel package.; Check distribution advisories for backported fixes before relying on upstream version numbers.; Restrict untrusted local shell access on systems that cannot be updated promptly..

Prepared

Jun 24, 2026, 11:46 UTC (UTC+00:00)

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