Linux kernel before 2.6.9, when running on the AMD64 and Intel EM64T architectures, allows local users to write to privileged IO ports via the OUTS instruction.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 2.6.5 | 2.6.5.x |
| linux / linux_kernel | 2.6.1 | 2.6.1.x |
| linux / linux_kernel | 2.6.3 | 2.6.3.x |
| linux / linux_kernel | 2.6.4 | 2.6.4.x |
| linux / linux_kernel | 2.6.2 | 2.6.2.x |
| linux / linux_kernel | 2.6.8 | 2.6.8.x |
| linux / linux_kernel | 2.6.0 | 2.6.0.x |
| linux / linux_kernel | 2.6.7 | 2.6.7.x |
| linux / linux_kernel | 2.6.8.1 | 2.6.8.1.x |
| linux / linux_kernel | 2.6.6 | 2.6.6.x |