Medium · published April 24, 2026
In the Linux kernel, the following vulnerability has been resolved:
x86/CPU: Fix FPDSS on Zen1
Zen1's hardware divider can leave, under certain circumstances, partial
results from previous operations. Those results can be leaked by
another, attacker thread.
Fix that with a chicken bit.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 3.16.58, < 3.17 | 3.17 |
| linux/linux_kernel | ≥ 4.4.144, < 4.5 | 4.5 |
| linux/linux_kernel | ≥ 4.9.102, < 4.10 | 4.10 |
| linux/linux_kernel | ≥ 4.14.1, < 5.10.253 | 5.10.253 |
| linux/linux_kernel | ≥ 5.11, < 5.15.203 | 5.15.203 |
| linux/linux_kernel | ≥ 5.16, < 6.1.169 | 6.1.169 |
| linux/linux_kernel | ≥ 6.2, < 6.6.135 | 6.6.135 |
| linux/linux_kernel | ≥ 6.7, < 6.12.82 | 6.12.82 |
| linux/linux_kernel | ≥ 6.13, < 6.18.23 | 6.18.23 |
| linux/linux_kernel | ≥ 6.19, < 6.19.13 | 6.19.13 |
| linux/linux_kernel | ≥ 7.0, < 7.0.1 | 7.0.1 |
| linux/linux_kernel | all versions | — |