The x86 emulator in KVM 83, when a guest is configured for Symmetric Multiprocessing (SMP), does not properly restrict writing of segment selectors to segment registers, which might allow guest OS users to cause a denial of service (guest OS crash) or gain privileges on the guest OS by leveraging access to a (1) IO port or (2) MMIO region, and replacing an instruction in between emulator entry and instruction fetch.
2010-03-05T16:30:00.707
2025-04-11T00:51:21.963
Deferred
CVSSv2: 4.4 (MEDIUM)
AV:L/AC:M/Au:N/C:P/I:P/A:P
3.4
6.4
Type | Vendor | Product | Version/Range | Vulnerable? |
---|---|---|---|---|
Application | kvm_qumranet | kvm | 83 | Yes |