CVE-2026-74377
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: Copy WQE to local buffer in non-SRQ receive path
For non-SRQ QPs, the responder reads WQE fields directly from the
shared queue buffer mapped into userspace. This allows a malicious
user to modify fields like num_sge or sge entries while the kernel
is processing the WQE, leading to out-of-bounds reads in
rxe_resp_check_length() and copy_data().
Introduce get_recv_wqe() that validates num_sge and copies the WQE
to a kernel-local buffer before processing, matching the approach
already used for SRQ WQEs in get_srq_wqe(). The srq_wqe buffer is
reused since SRQ and non-SRQ paths are mutually exclusive per QP.
https://git.kernel.org/stable/c/2e60378fb3c8b51c94103bb40014c4fe38fa5033
https://git.kernel.org/stable/c/5420eebf3b3c162bfaf965f30e61cd1d689e5732
https://git.kernel.org/stable/c/9fa785137303f7109c23dea779b8dedc67c9b531
https://git.kernel.org/stable/c/a211b7904aed365e4e4f08a48ec6e6dd1ea7b16b
https://git.kernel.org/stable/c/d6ab440240a04b8737ee4c7bb21af9182e451733
https://git.kernel.org/stable/c/fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78