OVH has disclosed a plan to mitigate the critical Januscape bug, also known as CVE-2026-53359, which affects Linux kernel-based virtual machines, by conducting mass reboots in its infrastructure. The company used its Sydney datacenter as a testbed to roll out the fix, ensuring a rapid and stable deployment. The Januscape bug allows attackers with root access to a guest VM to execute code as root on the host, potentially crashing the machine or taking control of other guest VMs. This vulnerability poses a significant threat to cloud operators, as many rely on KVM to virtualize their servers. OVH's approach to addressing the issue involved testing the fix in a controlled environment before implementing it more broadly1. The mitigation of this bug is crucial, as its exploitation could have severe consequences, and practitioners should prioritize their response based on their exposure to the vulnerability and available evidence of exploitation.