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CVE-2026-72279

9.0 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Respect read-only PFN when mapping L1 VNCR KVM currently maps the L1 VNCR into the host stage-1 by relying enti…

Published Aug 15, 2026EPSS 0.19%

Overview

CVE-2026-72279 is a critical-severity vulnerability. It was published on August 15, 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: nv: Respect read-only PFN when mapping L1 VNCR

KVM currently maps the L1 VNCR into the host stage-1 by relying entirely

on the permissions of the guest stage-1. At the same time, it is

entirely possible that the backing PFN is read-only (e.g. RO memslot),

meaning that the L1 VNCR should use at most a read-only mapping.

Cache the writability of the PFN in the VNCR TLB and use it to constrain

the resulting fixmap permissions. Promote VNCR permission faults to an

SEA in the case where the guest attempts to write to a read-only

endpoint. Conveniently, this also plugs a page leak found by Sashiko [*]

resulting from the early return for a read-only PFN.

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/2684e02bac41c5220f6c1ab2bdcc957b71812977Refgit.kernel.org/stable/c/5c50db5bcbb9073cb2fd97be51b962de92f429e9Refgit.kernel.org/stable/c/d35defbdfcb15296ebe28968ad7452c1a8c11cea

How CyberStrike helps

Frequently asked questions

What is CVE-2026-72279?

CVE-2026-72279 is a critical-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 9.0 (CRITICAL).

How severe is CVE-2026-72279?

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-2026-72279?

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-2026-72279?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-72279 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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