The x86 emulator in KVM 83 does not use the Current Privilege Level (CPL) and I/O Privilege Level (IOPL) in determining the memory access available to CPL3 code, which allows 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, a related issue to CVE-2010-0306.
| Software | From | Fixed in |
|---|---|---|
| debian / debian_linux | 5.0 | 5.0.x |
| linux / linux_kernel | 2.6.28 | 2.6.33.x |