CVE-2011-3593: A certain Red Hat patch to the vlan_hwaccel_do_receive function in net/8021q/vlan_core.c in the Linux kerne...

Security readout for executives and security teams

This is a denial-of-service flaw in a Red Hat Enterprise Linux 6 kernel VLAN handling path. An attacker able to send priority-tagged VLAN frames to an affected system could crash it. The sources do not show data theft, code execution, or confirmed active exploitation. Most relevant exposure is legacy RHEL 6 systems using the affected 2.6.32 kernel lineage and reachable by priority-tagged VLAN frames. Evidence in the source bundle does not establish affected non-RHEL products, cloud services, or application-layer exposure. Prioritize remediation for legacy RHEL 6 systems on VLAN-enabled or shared network segments. Business risk is service outage from host crashes, not confirmed compromise. Modern environments without affected kernels should document non-applicability and move on. Mitigation focus: Check Red Hat guidance for CVE-2011-3593 and affected kernel errata.; Apply vendor-supported kernel updates where the system matches the affected RHEL 6 kernel lineage.; Prioritize systems carrying VLAN traffic or exposed to less trusted network segments..

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.