CVSS 6.5 · Medium EPSS 8,5%
Kerentanan Access of Resource Using Incompatible Type ('Type Confusion') pada xen, fedoraproject fedora. Skor CVSS 3.1 6.5 (Medium) menurut CISA ADP.
Unlike 32-bit PV guests, HVM guests may switch freely between 64-bit and other modes. This in particular means that they may set registers used to pass 32-bit-mode hypercall arguments to values outside of the range 32-bit code would be able to set them to. When processing of hypercalls takes a considerable amount of time, the hypervisor may choose to invoke a hypercall continuation. Doing so involves putting (perhaps updated) hypercall arguments in respective registers. For guests not running in 64-bit mode this further involves a certain amount of translation of the values. Unfortunately internal sanity checking of these translated values assumes high halves of registers to always be clear when invoking a hypercall. When this is found not to be the case, it triggers a consistency check in the hypervisor and causes a crash.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| xen | xen | Versi 3.2.0 dan sesudahnya |
| fedoraproject | fedora | Versi 38 |
| fedoraproject | fedora | Versi 40 |