CVE-2026-98465

HIGH

MEDIUM Priority: 0.01 BB Relevance: 29/100

Published: 2026-10-18 Modified: 2026-10-24 First seen: 2026-10-29 Status: active

Attack Surface

No Interaction Scope Change

CVSS Vector Breakdown

AV: Local

AC: High

PR: Low

UI: None

S: Changed

C: Low

I: Low

A: High

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.