Description
In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Use READ_ONCE() when reading entries/indices from PSC buffer Use READ_ONCE() when reading entries/indices from the guest-accessible Page State Change buffer to defend against TOCTOU bugs. Don't bother with READ_ONCE()/WRITE_ONCE() for cases where KVM is writing (and not consuming the result!), as the guest isn't supposed to touch the buffer while it's being processed. I.e. using READ_ONCE() is all about protecting against misbehaving guests.
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
9b54e248d2644be71cb394eb85f31ad99e023a05 to < bd232801ef1d1fd985d2d4ca3cd1d888303ca86faffected9b54e248d2644be71cb394eb85f31ad99e023a05 to < b1dfaa6f7a957726a6800135be3659fbe4bbf2a4affected9b54e248d2644be71cb394eb85f31ad99e023a05 to < edbbe88f83b524434974e84808d3093199d67c24affected9b54e248d2644be71cb394eb85f31ad99e023a05 to < c8cc238093ca6c99267032f6cfe78f59389f3157affected
Linux Linux
Default version status: affected
6.11affected0 to < 6.11unaffected6.12.93 to ≤ 6.12.*unaffected6.18.35 to ≤ 6.18.*unaffected7.0.12 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected