High · published July 25, 2025
In the Linux kernel, the following vulnerability has been resolved:
atm: clip: Fix potential null-ptr-deref in to_atmarpd().
atmarpd is protected by RTNL since commit f3a0592b37b8 ("[ATM]: clip
causes unregister hang").
However, it is not enough because to_atmarpd() is called without RTNL,
especially clip_neigh_solicit() / neigh_ops->solicit() is unsleepable.
Also, there is no RTNL dependency around atmarpd.
Let's use a private mutex and RCU to protect access to atmarpd in
to_atmarpd().
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 2.6.13, < 5.4.296 | 5.4.296 |
| linux/linux_kernel | ≥ 5.5, < 5.10.240 | 5.10.240 |
| linux/linux_kernel | ≥ 5.11, < 5.15.189 | 5.15.189 |
| linux/linux_kernel | ≥ 5.16, < 6.1.146 | 6.1.146 |
| linux/linux_kernel | ≥ 6.2, < 6.6.99 | 6.6.99 |
| linux/linux_kernel | ≥ 6.7, < 6.12.39 | 6.12.39 |
| linux/linux_kernel | ≥ 6.13, < 6.15.7 | 6.15.7 |
| 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 | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| debian/debian_linux | all versions | — |