VGHOST: BEYOND THE PRIVILEGE BOUNDARY

Summary from the TLDR InfoSec newsletter

Vghost is a Linux vhost bug (CVE-2026-74580, CVSS 8.8) that lets any user who can open /dev/vhost-net or /dev/vhost-vsock read and write kernel memory and escalate to root. It affects kernels 4.11 through 7.2. Tencent Zhuque Lab confirmed the root exploit on five major distros and showed a malicious VM guest can use the same bug to hijack the host's QEMU process. Admins should patch to a kernel with fix de845981da67 and, until then, remove world access from both vhost device nodes, which RHEL, Amazon Linux, Azure Linux, and Oracle Linux expose by default.