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1.3 KiB
1.3 KiB
CVE-2024-39293
Description
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 instancesredirect to the same AF_XDP socket. By removing the queue_index check, it ispossible 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 whenflushing the rings in __xsk_flush(). This can happen when the linked list ofsockets to flush gets corrupted by concurrent accesses. A quick and small fixis not possible, so let us revert this for now.
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