CVE-2024-40992 Information

Description

In the Linux kernel the following vulnerability has been resolved:

RDMA/rxe: Fix responder length checking for UD request packets

According to the IBA specification: If a UD request packet is detected with an invalid length the request shall be an invalid request and it shall be silently dropped by the responder. The responder then waits for a new request packet.

commit 689c5421bfe0 (\RDMA/rxe: Fix incorrect responder length checking) defers responder length check for UD QPs in function copy_data. But it introduces a regression issue for UD QPs.

When the packet size is too large to fit in the receive buffer. copy_data will return error code -EINVAL. Then send_data_in will return RESPST_ERR_MALFORMED_WQE. UD QP will transfer into ERROR state.

Reference

https://git.kernel.org/stable/c/163868ec1f6c610d16da9e458fe1dd7d5de97341 https://git.kernel.org/stable/c/943c94f41dfe36536dc9aaa12c9efdf548ceb996 https://git.kernel.org/stable/c/f67ac0061c7614c1548963d3ef1ee1606efd8636