Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected db8b7e97d6137a28b2bfc07e591d54da268f0c36 before 6c2bcf6b173d4afed883cceea9d47f2c5194161d; affected db8b7e97d6137a28b2bfc07e591d54da268f0c36 before a29c5d2dd2ef9a8617a9a6d5585696d5f149cd98; affected db8b7e97d6137a28b2bfc07e591d54da268f0c36 before c525772c304c971b0d3a1f2898dedbae653efe90; affected db8b7e97d6137a28b2bfc07e591d54da268f0c36 before 71acbea44e78665ea90e3c310fca6bbdcc0252db; affected db8b7e97d6137a28b2bfc07e591d54da268f0c36 before 8ae12ccaec6ec74945d8c1ef39f2c1b8df779abc |
| Linux / Linux | affected 6.5; unaffected 0 before 6.5; unaffected 6.6.160 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.55 through 6.18.*; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6c2bcf6b173d4afed883cceea9d47f2c5194161d
- 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