{"id":"CVE-2026-98470","state":"PUBLISHED","title":"KVM: arm64: Don't WARN on an unknown VM ioctl in protected mode","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.","publishedAt":"2026-10-18T15:15:22.878Z","updatedAt":"2026-10-19T09:20:08.206Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b12b3b04f6ba072ca5a618a75e546c996be94bd1","status":"affected","lessThan":"cc53eb5c6515e3221314624a22c9da9c80a67f63","versionType":"git"},{"version":"b12b3b04f6ba072ca5a618a75e546c996be94bd1","status":"affected","lessThan":"49d9d295d69d07e850cae35933ba8519e2915f26","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/include/asm/kvm_pkvm.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.0","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/include/asm/kvm_pkvm.h"]}],"references":["https://git.kernel.org/stable/c/cc53eb5c6515e3221314624a22c9da9c80a67f63","https://git.kernel.org/stable/c/49d9d295d69d07e850cae35933ba8519e2915f26"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98470.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98470","state":"PUBLISHED","datePublished":"2026-10-18T15:15:22.878Z","dateUpdated":"2026-10-19T09:20:08.206Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.351Z"},"containers":{"cna":{"title":"KVM: arm64: Don't WARN on an unknown VM ioctl in protected mode","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b12b3b04f6ba072ca5a618a75e546c996be94bd1","status":"affected","lessThan":"cc53eb5c6515e3221314624a22c9da9c80a67f63","versionType":"git"},{"version":"b12b3b04f6ba072ca5a618a75e546c996be94bd1","status":"affected","lessThan":"49d9d295d69d07e850cae35933ba8519e2915f26","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/include/asm/kvm_pkvm.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.0","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/include/asm/kvm_pkvm.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/cc53eb5c6515e3221314624a22c9da9c80a67f63"},{"url":"https://git.kernel.org/stable/c/49d9d295d69d07e850cae35933ba8519e2915f26"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:20:08.206Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}