UBUNTU-CVE-2026-23198

In the Linux kernel, the following vulnerability has been resolved: KVM: Don't clobber irqfd routing type when deassigning irqfd When deassigning a KVMIRQFD, don't clobber the irqfd's copy of the IRQ's routing entry as doing so breaks kvmarchirqbypassdelproducer on x86 and arm64, which explicitly...

CVE-2026-23198

CVE-2026-23198 relates to the Linux kernel KVM irqfd handling. The vulnerability arose when deassociating an IRQFD could clobber the irqfd’s copy of the IRQ’s routing entry, causing arch-specific code (e.g., kvm_arch_irq_bypass_del_producer on x86/arm64) to misinterpret routing as MSI. The fix ch...