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CVE-2026-72277

9.3 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Inject SEA if guest VNCR isn't normal memory When constructing an L1 VNCR mapping, KVM unconditionally uses cac…

Published Aug 15, 2026EPSS 0.19%

Overview

CVE-2026-72277 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: Inject SEA if guest VNCR isn't normal memory

When constructing an L1 VNCR mapping, KVM unconditionally uses cacheable

memory attributes, even if the underlying PFN isn't memory. This gets

particularly hairy if the endpoint doesn't support cacheable memory

attributes, potentially throwing an SError on writeback...

While KVM does permit cacheable memory attributes on certain PFNMAP

VMAs, kvm_translate_vncr() isn't currently grabbing the VMA. So do the

simpler thing for now and just reject everything that isn't memory.

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/4bd7dbe0b2243e6aa735cae4d5e1ff988b30b2a6Refgit.kernel.org/stable/c/bc00e0e376ee3572f5d26c174473abef1e35deccRefgit.kernel.org/stable/c/d5436e18e4fc2886ac306304d884ea3b92e1edbf

How CyberStrike helps

Frequently asked questions

What is CVE-2026-72277?

CVE-2026-72277 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-2026-72277?

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-2026-72277?

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-2026-72277?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-72277 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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