CVE-2026-98470: Linux vulnerability

CVE-2026-98470: KVM: arm64: Don't WARN on an unknown VM ioctl in protected mode

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.

UnknownCVSS not scoredNot KEV-listedUpdatedOct 19, 2026, 09:20 UTC (UTC+00:00)

Potential ATT&CK relevance

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CVE-2026-98470 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Oct 18, 2026, 15:15 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

0ADP providers

3Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Sep 25, 2026, 10:25 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Oct 18, 2026, 15:15 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Oct 19, 2026, 09:20 UTC (UTC+00:00)

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/cc53eb5c6515e3221314624a22c9da9c80a67f63CVE reference, Linux
https://git.kernel.org/stable/c/49d9d295d69d07e850cae35933ba8519e2915f26CVE reference, Linux

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinuxb12b3b04f6ba072ca5a618a75e546c996be94bd1, b12b3b04f6ba072ca5a618a75e546c996be94bd1unaffected

LinuxLinux7.0, 0, 7.2.9, 7.3affected

Weakness

CWE details

No CWE listed

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