CVE-2016-6835: The vmxnet_tx_pkt_parse_headers function in hw/net/vmxnet_tx_pkt.c in QEMU (aka Quick Emulator) allows loca...

Security readout for executives and security teams

CVE-2016-6835 is a QEMU virtualization flaw where a privileged administrator inside a guest VM could crash or disrupt the host's emulated network device handling. The business risk is mainly service interruption for affected virtualized workloads, not confirmed data theft or remote internet compromise. Exposure is likely limited to environments running affected QEMU versions with vmxnet3 emulated network devices. The attacker position described is local guest OS administrator, so shared virtualization, delegated VM administration, and compromised guest roots matter most. Treat as a moderate infrastructure reliability issue. It deserves scheduled remediation, faster where untrusted tenants or third parties administer guest VMs, but the provided evidence does not support emergency internet-wide exposure. Mitigation focus: Inventory QEMU hosts and VMs using vmxnet3 device emulation.; Apply QEMU or distribution security updates that include the referenced IP header length check.; Use Debian LTS and Red Hat advisories for package-specific remediation guidance..

Prepared

Jun 13, 2026, 13:16 UTC (UTC+00:00)

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