{"cve":"CVE-2026-98470","nvd":{"published":"2026-10-18T16:16:57.507","modified":"2026-10-19T10:18:57.220","status":"Received","description":"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_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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/49d9d295d69d07e850cae35933ba8519e2915f26","https://git.kernel.org/stable/c/cc53eb5c6515e3221314624a22c9da9c80a67f63"],"products":[],"source":"nvd","synced_at":"2026-10-19T23:00:53.604569364+00:00"},"epss":{"cve":"CVE-2026-98470","score":0.00155,"percentile":0.04646,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}