Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9b54e248d2644be71cb394eb85f31ad99e023a05 before bd232801ef1d1fd985d2d4ca3cd1d888303ca86f; affected 9b54e248d2644be71cb394eb85f31ad99e023a05 before b1dfaa6f7a957726a6800135be3659fbe4bbf2a4; affected 9b54e248d2644be71cb394eb85f31ad99e023a05 before edbbe88f83b524434974e84808d3093199d67c24; affected 9b54e248d2644be71cb394eb85f31ad99e023a05 before c8cc238093ca6c99267032f6cfe78f59389f3157 |
| Linux / Linux | affected 6.11; unaffected 0 before 6.11; unaffected 6.12.93 through 6.12.*; unaffected 6.18.35 through 6.18.*; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/bd232801ef1d1fd985d2d4ca3cd1d888303ca86f
- https://git.kernel.org/stable/c/b1dfaa6f7a957726a6800135be3659fbe4bbf2a4
- https://git.kernel.org/stable/c/edbbe88f83b524434974e84808d3093199d67c24
- https://git.kernel.org/stable/c/c8cc238093ca6c99267032f6cfe78f59389f3157
ADP enrichment
No English description supplied.
No references supplied.