CVE-2026-98465RISC-V: KVM: Serialize IMSIC attributes with vCPU migration
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from db8b7e97d6137a28b2bfc07e591d54da268f0c36 before a29c5d2dd2ef9a8617a9a6d5585696d5f149cd98; from db8b7e97d6137a28b2bfc07e591d54da268f0c36 before c525772c304c971b0d3a1f2898dedbae653efe90; from db8b7e97d6137a28b2bfc07e591d54da268f0c36 before 71acbea44e78665ea90e3c310fca6bbdcc0252db; from db8b7e97d6137a28b2bfc07e591d54da268f0c36 before 8ae12ccaec6ec74945d8c1ef39f2c1b8df779abc | CNA record |
References
- https://git.kernel.org/stable/c/a29c5d2dd2ef9a8617a9a6d5585696d5f149cd98
- https://git.kernel.org/stable/c/c525772c304c971b0d3a1f2898dedbae653efe90
- https://git.kernel.org/stable/c/71acbea44e78665ea90e3c310fca6bbdcc0252db
- https://git.kernel.org/stable/c/8ae12ccaec6ec74945d8c1ef39f2c1b8df779abc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.