CVE-2024-39293
In the Linux kernel, the following vulnerability has been resolved: Revert "xsk: Support redirect to any socket bound to the same umem" This reverts commit 2863d665ea41282379f108e4da6c8a2366ba66db. This patch introduced a potential kernel crash when multiple napi instances redirect to the same AF_XDP socket. By removing the queue_index check, it is possible for multiple napi instances to access the Rx ring at the same time, which will result in a corrupted ring state which can lead to a crash when flushing the rings in __xsk_flush(). This can happen when the linked list of sockets to flush gets corrupted by concurrent accesses. A quick and small fix is not possible, so let us revert this for now.
- Score
- CVSS 3.1 9.8 Critical
- Status
- Modified - 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- Published
- 2024-06-25
- Last modified
- 2026-08-05
- Weaknesses
- CWE-362
Affected products
References
- https://git.kernel.org/stable/c/19cb40b1064566ea09538289bfcf5bc7ecb9b6f5
- https://git.kernel.org/stable/c/7fcf26b315bbb728036da0862de6b335da83dff2
