CVE-2026-46655: Heap-based Buffer Overflow

virtio-win provides Windows paravirtualized drivers for QEMU and KVM. From mm210 until mm320, the Viosock driver permits a low-privilege local process to submit an IOCTLSELECT request with attacker-controlled VIRTIOVSOCKSELECT.Fdss.fdcount values that overflow the 32-bit sum used by VIOSockSelect...

CVE-2026-46655

A flaw was found in virtio-win. A low-integrity process can issue an IOCTL request to viosock.sys!VIOSockSelect with a maliciously crafted request that causes an integer overflow. This allows the process to circumvent bounds checking, resulting in a heap overflow in the NonPagedPool kernel heap...