High · published May 6, 2026
In the Linux kernel, the following vulnerability has been resolved:
eventpoll: defer struct eventpoll free to RCU grace period
In certain situations, ep_free() in eventpoll.c will kfree the epi->ep
eventpoll struct while it still being used by another concurrent thread.
Defer the kfree() to an RCU callback to prevent UAF.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 6.4.1, < 6.6.136 | 6.6.136 |
| linux/linux_kernel | ≥ 6.7, < 6.12.83 | 6.12.83 |
| linux/linux_kernel | ≥ 6.13, < 6.18.24 | 6.18.24 |
| linux/linux_kernel | ≥ 6.19, < 6.19.14 | 6.19.14 |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |