{"id":"CVE-2026-98470","title":"KVM: arm64: Don't WARN on an unknown VM ioctl in protected mode","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Don't WARN on an unknown VM ioctl in protected mode\n\nkvm_pkvm_ioctl_allowed() WARNs when kvm_get_cap_for_kvm_ioctl() doesn't\nfind the ioctl number in vm_ioc…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= b12b3b04f6ba072ca5a618a75e546c996be94bd1 < cc53eb5c6515e3221314624a22c9da9c80a67f63","Linux >= b12b3b04f6ba072ca5a618a75e546c996be94bd1 < 49d9d295d69d07e850cae35933ba8519e2915f26","Linux 7.0"],"published":"2026-10-18","updated":"2026-10-19","sourceUpdated":"2026-10-19T09:20:08.206Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98470","references":[{"url":"https://git.kernel.org/stable/c/cc53eb5c6515e3221314624a22c9da9c80a67f63"},{"url":"https://git.kernel.org/stable/c/49d9d295d69d07e850cae35933ba8519e2915f26"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.297Z","slug":"CVE-2026-98470","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Don't WARN on an unknown VM ioctl in protected mode\n\nkvm_pkvm_ioctl_allowed() WARNs when kvm_get_cap_for_kvm_ioctl() doesn't\nfind the ioctl number in vm_ioctl_caps[], and kvm_arch_vm_ioctl() calls\nit for every number the generic code doesn't handle, so\nioctl(vm_fd, 0xdeadbeef) from userspace taints a pKVM host and panics it\nunder panic_on_warn. The lookup is fed userspace input: return false,\nand userspace gets the -EINVAL kvm_arch_vm_ioctl() returns for that\nnumber on a host without pKVM.\n\n## Affected\n\n- `Linux >= b12b3b04f6ba072ca5a618a75e546c996be94bd1 < cc53eb5c6515e3221314624a22c9da9c80a67f63`\n- `Linux >= b12b3b04f6ba072ca5a618a75e546c996be94bd1 < 49d9d295d69d07e850cae35933ba8519e2915f26`\n- `Linux 7.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}