Tracker / CVE-2022-49085
CVE-2022-49085
In the Linux kernel, the following vulnerability has been resolved: drbd: Fix five use after free bugs in get_initial_state In get_initial_state, it calls notify_initial_state_done(skb,..) if cb->args[5]==1. If genlmsg_put() failed in notify_initial_state_done(), the skb will be freed by nlmsg_free(skb). Then get_initial_state will goto out and the freed skb will be used by return value skb->len, which is a uaf bug. What's worse, the same problem goes even further: skb can also be freed in the notify_*_state_change -> notify_*_state calls below. Thus 4 additional uaf bugs happened. My patch lets the problem callee functions: notify_initial_state_done and notify_*_state_change return an error code if errors happen. So that the error codes could be propagated and the uaf bugs can be avoid. v2 reports a compilation warning. This v3 fixed this warning and built successfully in my local environment with no additional warnings. v2: https://lore.kernel.org/patchwork/patch/1435218/
Prodotti e versioni affette
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 4.10 → 4.14.276 |
| linux | linux_kernel · 4.15 → 4.19.238 |
| linux | linux_kernel · 4.20 → 5.4.189 |
| linux | linux_kernel · 4.5 → 4.9.311 |
| linux | linux_kernel · 5.11 → 5.15.34 |
| linux | linux_kernel · 5.16 → 5.16.20 |
| linux | linux_kernel · 5.17 → 5.17.3 |
| linux | linux_kernel · 5.5 → 5.10.111 |