CVE-2024-50059
Description
In the Linux kernel, the following vulnerability has been resolved: ntb: ntb_hw_switchtec: Fix use after free vulnerability in switchtec_ntb_remove due to race condition In the switchtec_ntb_add function, it can call switchtec_ntb_init_sndev function, then &sndev->check_link_status_work is bound with check_link_status_work. switchtec_ntb_link_notification may be called to start the work. If we remove the module which will call switchtec_ntb_remove to make cleanup, it will free sndev through kfree(sndev), while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | check_link_status_work switchtec_ntb_remove | kfree(sndev); | | if (sndev->link_force_down) | // use sndev Fix it by ensuring that the work is canceled before proceeding with the cleanup in switchtec_ntb_remove.
How to fix
- linux linux_kernel5.10.227, 5.15.168, 6.1.113, 6.6.57, 6.11.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 5.10.227, 5.11 ≤ v < 5.15.168, 5.16 ≤ v < 6.1.113, 6.2 ≤ v < 6.6.57, 6.7 ≤ v < 6.11.4 | 5.10.227, 5.15.168, 6.1.113, 6.6.57, 6.11.4 |
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