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CVE-2026-98465

7.0 · HIGH

In the Linux kernel, the following vulnerability has been resolved: RISC-V: KVM: Serialize IMSIC attributes with vCPU migration KVM device ioctls are not serialized against KVM_RUN.

Published Oct 18, 2026EPSS 0.14%

Overview

CVE-2026-98465 is a high-severity vulnerability. It was published on October 18, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.0, 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:

RISC-V: KVM: Serialize IMSIC attributes with vCPU migration

KVM device ioctls are not serialized against KVM_RUN. As a result,

kvm_riscv_aia_imsic_rw_attr() can snapshot the physical CPU and HGEI of

an IMSIC VS-file before a concurrent vCPU migration releases it.

The HGEI can then be allocated to another vCPU before imsic_vsfile_rw()

uses the stale tuple. A GET or SET attribute may consequently access the

new owner's interrupt file.

Serialize the entire IMSIC attribute operation with the target vCPU

mutex. This prevents the VS-file from being migrated and recycled until

the attribute access completes. Acquire the mutex killably so that the

device ioctl remains interruptible while waiting for KVM_RUN to finish.

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/6c2bcf6b173d4afed883cceea9d47f2c5194161dRefgit.kernel.org/stable/c/71acbea44e78665ea90e3c310fca6bbdcc0252dbRefgit.kernel.org/stable/c/8ae12ccaec6ec74945d8c1ef39f2c1b8df779abcRefgit.kernel.org/stable/c/a29c5d2dd2ef9a8617a9a6d5585696d5f149cd98Refgit.kernel.org/stable/c/c525772c304c971b0d3a1f2898dedbae653efe90

How CyberStrike helps

Frequently asked questions

What is CVE-2026-98465?

CVE-2026-98465 is a high-severity vulnerability. It was published on October 18, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).

How severe is CVE-2026-98465?

This vulnerability has a CVSS 3.1 base score of 7.0, 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-2026-98465?

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-2026-98465?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-98465 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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