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CVE PROGRAM SOURCE RECORD7.0 High

CVE-2026-98465

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

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • db8b7e97d6137a28b2bfc07e591d54da268f0c36 to < 6c2bcf6b173d4afed883cceea9d47f2c5194161daffected
  • db8b7e97d6137a28b2bfc07e591d54da268f0c36 to < a29c5d2dd2ef9a8617a9a6d5585696d5f149cd98affected
  • db8b7e97d6137a28b2bfc07e591d54da268f0c36 to < c525772c304c971b0d3a1f2898dedbae653efe90affected
  • db8b7e97d6137a28b2bfc07e591d54da268f0c36 to < 71acbea44e78665ea90e3c310fca6bbdcc0252dbaffected
  • db8b7e97d6137a28b2bfc07e591d54da268f0c36 to < 8ae12ccaec6ec74945d8c1ef39f2c1b8df779abcaffected

Linux Linux

Default version status: affected

  • 6.5affected
  • 0 to < 6.5unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.112 to ≤ 6.12.*unaffected
  • 6.18.55 to ≤ 6.18.*unaffected
  • 7.2.9 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References