High · published June 29, 2023
A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation.
Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer.
We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable).
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 5.10.162, < 5.10.185 | 5.10.185 |
| linux/linux_kernel | ≥ 5.13, < 6.4 | 6.4 |
| canonical/ubuntu_linux | all versions | — |
| canonical/ubuntu_linux | all versions | — |
| canonical/ubuntu_linux | all versions | — |
| canonical/ubuntu_linux | all versions | — |
| canonical/ubuntu_linux | all versions | — |
| debian/debian_linux | all versions | — |
| debian/debian_linux | all versions | — |