CVE-2016-9756: arch/x86/kvm/emulate.c in the Linux kernel before 4.8.12 does not properly initialize Code Segment (CS) in...

Security readout for executives and security teams

CVE-2016-9756 is a Linux KVM kernel information leak. A local user could trigger certain KVM x86 emulation error paths and receive sensitive data from kernel stack memory. The provided sources do not show internet-based exploitation or CISA KEV listing. Exposure is most likely on Linux systems using KVM where untrusted local users or workloads can run code. Internet-facing-only services are not directly indicated by the sources. Affected distribution package versions are not fully enumerated in the provided CVE data. Prioritize patch verification on virtualization hosts and shared Linux systems. This is not shown as remotely exploitable or actively exploited, but kernel memory disclosure can aid later attacks when an attacker already has local code execution. Mitigation focus: Upgrade to Linux kernel 4.8.12 or a vendor-backported fixed kernel.; Check Red Hat, SUSE, or other distribution advisories for fixed package versions.; Restrict untrusted local shell or workload access on KVM hosts..

Prepared

Jun 13, 2026, 12:51 UTC (UTC+00:00)

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