CVE-2026-92513

Summary

In the Linux kernel, the following vulnerability has been resolved:

RDMA/mana_ib: drain QP references after partial table insertion

mana_table_store_ud_qp() publishes a QP at its send-queue id before inserting the receive-queue id, dropping the XArray lock between the two xa_insert_irq() calls. A concurrent completion handler can look up the QP and take a transient reference. When the second insertion fails, the rollback erased only the send-queue entry and returned, leaving both the initial table reference and the transient reference outstanding while RDMA core frees the QP, causing a use-after-free.

Drain the reference as normal destruction does: drop the initial reference and wait for qp->free, releasing the QP only after every concurrent lookup returns its reference.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/4aaa2ab816c710be7385b31d08373edcdcd71656
• https://git.kernel.org/stable/c/638b9a5364c1482e5d104823c1a3884b3d249484
• https://git.kernel.org/stable/c/97f7c2262c28ebcae64fc957ee978646684a5ed9

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