cve-2024-39293
Vulnerability from cvelistv5
Published
2024-06-25 14:22
Modified
2024-12-19 09:06
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19cb40b1064566ea09538289bfcf5bc7ecb9b6f5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7fcf26b315bbb728036da0862de6b335da83dff2
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/19cb40b1064566ea09538289bfcf5bc7ecb9b6f5
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7fcf26b315bbb728036da0862de6b335da83dff2
Impacted products
Vendor Product Version
Linux Linux
Show details on NVD website

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"xsk: Support redirect to any socket bound to the same umem\"\n\nThis reverts commit 2863d665ea41282379f108e4da6c8a2366ba66db.\n\nThis patch introduced a potential kernel crash when multiple napi instances\nredirect to the same AF_XDP socket. By removing the queue_index check, it is\npossible for multiple napi instances to access the Rx ring at the same time,\nwhich will result in a corrupted ring state which can lead to a crash when\nflushing the rings in __xsk_flush(). This can happen when the linked list of\nsockets to flush gets corrupted by concurrent accesses. A quick and small fix\nis not possible, so let us revert this for now."
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