RISC-V: KVM: Serialize IMSIC attributes with vCPU migration
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.6.160, 6.12.112, 6.18.55, 7.2.9
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From db8b7e97d6137a28b2bfc07e591d54da268f0c36 · fixed in 6c2bcf6b173d4afed883cceea9d47f2c5194161d; From db8b7e97d6137a28b2bfc07e591d54da268f0c36 · fixed in a29c5d2dd2ef9a8617a9a6d5585696d5f149cd98; From db8b7e97d6137a28b2bfc07e591d54da268f0c36 · fixed in c525772c304c971b0d3a1f2898dedbae653efe90; From db8b7e97d6137a28b2bfc07e591d54da268f0c36 · fixed in 71acbea44e78665ea90e3c310fca6bbdcc0252db; From db8b7e97d6137a28b2bfc07e591d54da268f0c36 · fixed in 8ae12ccaec6ec74945d8c1ef39f2c1b8df779abc
- Linux Linux
6.5
- KernelLinux
From 6.5.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.112; From 6.13.0 · fixed in 6.18.55; From 6.19.0 · fixed in 7.2.9