Description
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ensure vendor's exit handler runs before fastpath userspace exits Move the handling of fastpath userspace exits into vendor code to ensure KVM runs vendor specific operations that need to run before userspace gains control of the vCPU. E.g. for VMX (and soon to be for SVM as well), KVM needs to flush the PML buffer prior to exiting to userspace, otherwise any memory written by the final KVM_RUN might never be flagged as dirty. Note, waiting to snapshot CR0 and CR3 until svm_handle_exit() is flawed in general, as that risks consuming stale state in a fastpath handler. That will be addressed in a future change.
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
f7f39c50edb9d336274371953275e0d3503b9b75 to < b3436d9b9b1affe1c3191ac9831308923f5f03c3affectedf7f39c50edb9d336274371953275e0d3503b9b75 to < 4ad73ef0e7966ecfe67de0060537b4cb14d9acd4affectedf7f39c50edb9d336274371953275e0d3503b9b75 to < f2ca2b5326211bd38490f0497eb583721ce0bbc0affectedf7f39c50edb9d336274371953275e0d3503b9b75 to < 0ffedf43910e44b76c2c1db4e9fbf12b268190c1affected
Linux Linux
Default version status: affected
6.12affected0 to < 6.12unaffected6.12.96 to ≤ 6.12.*unaffected6.18.39 to ≤ 6.18.*unaffected7.1.4 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected