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CVE-2026-72278

9.3 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Re-translate VNCR before injecting abort KVM faults in the VNCR page with FOLL_WRITE whenever the guest aborts…

Published Aug 15, 2026EPSS 0.19%

Overview

CVE-2026-72278 is a critical-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 9.3 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.3, 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: Re-translate VNCR before injecting abort

KVM faults in the VNCR page with FOLL_WRITE whenever the guest aborts

for a write, similar to how a regular stage-2 mapping is handled. It is

entirely possible that the guest reads from the VNCR before writing to

it, in which case the PFN could only be read-only.

Invalidate the VNCR TLB and re-fetch the translation upon taking a VNCR

abort, allowing the host mapping to be faulted in for write the second

time around. Interestingly enough, this also satisfies the ordering

requirements of FEAT_ETS2/3 between descriptor updates and MMU faults.

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/0a5dd8cf4d58ea28da132c2097cd1c525302ac48Refgit.kernel.org/stable/c/bb645aa0a4caeaf7f9cd32e9a948594d434c1a8fRefgit.kernel.org/stable/c/ea7a76d7d614b5f82b4d0785f9af3550e860a71a

How CyberStrike helps

Frequently asked questions

What is CVE-2026-72278?

CVE-2026-72278 is a critical-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 9.3 (CRITICAL).

How severe is CVE-2026-72278?

This vulnerability has a CVSS 3.1 base score of 9.3, 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-2026-72278?

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-2026-72278?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-72278 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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