Total vulnerabilities in the database
x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.
| Software | From | Fixed in |
|---|---|---|
| xen / xen | - | - |
| fedoraproject / fedora | 35 | 35.x |
| fedoraproject / fedora | 36 | 36.x |
| debian / debian_linux | 11.0 | 11.0.x |