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PUBLISHED

CVE-2024-26691

KVM: arm64: Fix circular locking dependency

Reserved:2024-02-19
Published:2024-04-03
Updated:2024-04-03

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Fix circular locking dependency The rule inside kvm enforces that the vcpu->mutex is taken *inside* kvm->lock. The rule is violated by the pkvm_create_hyp_vm() which acquires the kvm->lock while already holding the vcpu->mutex lock from kvm_vcpu_ioctl(). Avoid the circular locking dependency altogether by protecting the hyp vm handle with the config_lock, much like we already do for other forms of VM-scoped data.

Product status

Default status
unaffected

1da177e4c3f4 before 3d16cebf0112
affected

1da177e4c3f4 before 3ab1c40a1e91
affected

1da177e4c3f4 before 10c02aad111d
affected

Default status
affected

6.6.18
unaffected

6.7.6
unaffected

6.8
unaffected

References

https://git.kernel.org/stable/c/3d16cebf01127f459dcfeb79ed77bd68b124c228

https://git.kernel.org/stable/c/3ab1c40a1e915e350d9181a4603af393141970cc

https://git.kernel.org/stable/c/10c02aad111df02088d1a81792a709f6a7eca6cc

cve.org CVE-2024-26691

nvd.nist.gov CVE-2024-26691

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