Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-46317

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Reassign nested_mmus array behind mmu_lock kvm->arch.nested_mmus[] is walked under kvm->mmu_lock, including from th…

Published Jun 9, 2026EPSS 0.13%

Overview

CVE-2026-46317 is a high-severity vulnerability. It was published on June 9, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, 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: Reassign nested_mmus array behind mmu_lock

kvm->arch.nested_mmus[] is walked under kvm->mmu_lock, including from the

MMU notifier path (kvm_unmap_gfn_range() -> kvm_nested_s2_unmap()), which

can run at any time. kvm_vcpu_init_nested() reallocates the array and frees

the old buffer while holding only kvm->arch.config_lock, so such a walker

can reference the freed array.

Allocate the new array outside of mmu_lock, as the allocation can sleep.

Under the lock, copy the existing entries, fix up the back pointers and

reassign the array. Free the old buffer after dropping the lock, as

kvfree() can sleep as well.

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/4424dbcb06d68e34e51c019a5781a7dc00731971Refgit.kernel.org/stable/c/70543358fa08e0f7cebc3447c3b70fe97ad7aaa8Refgit.kernel.org/stable/c/918450ad6010df6ecd2efde12a1409e011da22d6

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46317?

CVE-2026-46317 is a high-severity vulnerability. It was published on June 9, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-46317?

This vulnerability has a CVSS 3.1 base score of 8.8, 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-2026-46317?

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-2026-46317?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46317 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.

Related HIGH CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999