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CVE-2026-64106

9.0 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits Userspace can restore an ITS Device Table Entry wh…

Published Jul 19, 2026EPSS 0.15%

Overview

CVE-2026-64106 is a critical-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 9.0 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits

Userspace can restore an ITS Device Table Entry whose Size field encodes

more EventID bits than the virtual ITS supports. The live MAPD path

rejects that state, but vgic_its_restore_dte() accepts it and stores the

out-of-range value in dev->num_eventid_bits.

Reject restored DTEs with num_eventid_bits > VITS_TYPER_IDBITS before

allocating the device. This mirrors the MAPD check and prevents the

restored state from reaching vgic_its_restore_itt(), where the unchecked

value can be converted into an oversized scan_its_table() range.

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/0680f511926589206f81f57f76ce131d7741a316Refgit.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00dRefgit.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95Refgit.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07Refgit.kernel.org/stable/c/b94538186a3eae3763b8f96dacd610920a865aa7Refgit.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4a

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64106?

CVE-2026-64106 is a critical-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 9.0 (CRITICAL).

How severe is CVE-2026-64106?

This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-64106?

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-2026-64106?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64106 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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