The Linux kernel before 5.4.1 on powerpc allows Information Exposure because the Spectre-RSB mitigation is not in place for all applicable CPUs, aka CID-39e72bf96f58. This is related to arch/powerpc/kernel/entry_64.S and arch/powerpc/kernel/security.c.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | - | 5.4.1 |
| redhat / enterprise_linux | 7.0 | 7.0.x |
| redhat / enterprise_linux | 6.0 | 6.0.x |
| canonical / ubuntu_linux | 16.04 | 16.04.x |
| canonical / ubuntu_linux | 18.04 | 18.04.x |
| canonical / ubuntu_linux | 19.04 | 19.04.x |
| fedoraproject / fedora | 30 | 30.x |
| canonical / ubuntu_linux | 14.04 | 14.04.x |
| redhat / enterprise_linux | 8.0 | 8.0.x |
| opensuse / leap | 15.1 | 15.1.x |
| canonical / ubuntu_linux | 19.10 | 19.10.x |
| fedoraproject / fedora | 31 | 31.x |