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CVE-2026-98466

8.2 · HIGH

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Transfer the hyp stack pages out of the host stage-2 fix_host_ownership() walks only the linear-map alias of each m…

Published Oct 18, 2026EPSS 0.17%

Overview

CVE-2026-98466 is a high-severity vulnerability. It was published on October 18, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: Transfer the hyp stack pages out of the host stage-2

fix_host_ownership() walks only the linear-map alias of each memblock

region, and the per-CPU hyp stack, mapped in the private VA range for

its guard page, has none.

Walk each stack's VA range with the same walker.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/22df195bff84300a3f04813d6148765c77ac565aRefgit.kernel.org/stable/c/3a8c562892b96f35bba1e00d5e455a15963bbb92Refgit.kernel.org/stable/c/e5dd2a91a7ae3a276e6d79806127e923936e241b

How CyberStrike helps

Frequently asked questions

What is CVE-2026-98466?

CVE-2026-98466 is a high-severity vulnerability. It was published on October 18, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-98466?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-98466?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-98466?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-98466 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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