CVE-2016-2538: Multiple integer overflows in the USB Net device emulator (hw/usb/dev-network.c) in QEMU before 2.5.1 allow...

Security readout for executives and security teams

CVE-2016-2538 affects older QEMU versions through the USB network device emulator. A guest administrator could crash the QEMU process or potentially read sensitive host memory. Business impact is mainly virtual-machine availability and host confidentiality where untrusted or semi-trusted guests run on vulnerable hypervisors. Exposure is most likely on legacy QEMU hosts running versions before 2.5.1 with the USB Net/RNDIS emulator available to guest VMs. The source bundle does not identify specific downstream package versions beyond vendor advisories. Prioritize remediation for multi-tenant, lab, or externally administered VM environments. For single-owner trusted guests, urgency is lower but still worth closing because the issue can affect host memory confidentiality and VM availability. Mitigation focus: Upgrade QEMU to 2.5.1 or a vendor-supported patched package.; Apply relevant distribution security updates from Ubuntu, Gentoo, Debian, or your platform vendor.; Disable unnecessary USB Net/RNDIS emulation for guest VMs where operationally possible..

Prepared

Jun 13, 2026, 14:22 UTC (UTC+00:00)

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