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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 to < 5126d8f5567f49b52e21fca320eaa97977055099affectedd04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 to < b650189687822b705711f0567a65a164a314d8dfaffectedd04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 to < 92728fceefdaa2a0a3aae675f86193b006eeaa43affectedd04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 to < 3ae45be8492460a35b5aebf6acac1f1d32708946affectedd04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 to < fa840ba4bd9f3bad7f104e5b32028ee73af8b3ddaffectedd04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 to < 177925d9c8715a897bb79eca62628862213ba956affectedd04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 to < e51aded92d42784313ba16c12f4f88cc4f973bbbaffected
Linux Linux
Default version status: affected
4.16affected0 to < 4.16unaffected5.4.285 to ≤ 5.4.*unaffected5.10.227 to ≤ 5.10.*unaffected5.15.168 to ≤ 5.15.*unaffected6.1.113 to ≤ 6.1.*unaffected6.6.57 to ≤ 6.6.*unaffected6.11.4 to ≤ 6.11.*unaffected6.12 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/5126d8f5567f49b52e21fca320eaa97977055099 ↗
- https://git.kernel.org/stable/c/b650189687822b705711f0567a65a164a314d8df ↗
- https://git.kernel.org/stable/c/92728fceefdaa2a0a3aae675f86193b006eeaa43 ↗
- https://git.kernel.org/stable/c/3ae45be8492460a35b5aebf6acac1f1d32708946 ↗
- https://git.kernel.org/stable/c/fa840ba4bd9f3bad7f104e5b32028ee73af8b3dd ↗
- https://git.kernel.org/stable/c/177925d9c8715a897bb79eca62628862213ba956 ↗
- https://git.kernel.org/stable/c/e51aded92d42784313ba16c12f4f88cc4f973bbb ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗