CVE-2026-98470

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Don't WARN on an unknown VM ioctl in protected mode kvm_pkvm_ioctl_allowed() WARNs when kvm_get_cap_for_kvm_ioctl() doesn't find the ioctl number in vm_ioctl_caps[], and kvm_arch_vm_ioctl() calls it for every number the generic code doesn't handle, so ioctl(vm_fd, 0xdeadbeef) from userspace taints a pKVM host and panics it under panic_on_warn. The lookup is fed userspace input: return false, and userspace gets the -EINVAL kvm_arch_vm_ioctl() returns for that number on a host without pKVM.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-10-18 16:16:57.507000

Last modified

2026-10-19 10:18:57.220000

View original CVE JSON

{
  "id": "CVE-2026-98470",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-18T16:16:57.507",
  "lastModified": "2026-10-19T10:18:57.220",
  "vulnStatus": "Received",
  "cveTags": [],
  "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": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "arch/arm64/include/asm/kvm_pkvm.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "b12b3b04f6ba072ca5a618a75e546c996be94bd1",
              "lessThan": "cc53eb5c6515e3221314624a22c9da9c80a67f63",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "b12b3b04f6ba072ca5a618a75e546c996be94bd1",
              "lessThan": "49d9d295d69d07e850cae35933ba8519e2915f26",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "arch/arm64/include/asm/kvm_pkvm.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "7.0",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "7.0",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.9",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/49d9d295d69d07e850cae35933ba8519e2915f26",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cc53eb5c6515e3221314624a22c9da9c80a67f63",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}