CVE-2026-92513
UnknownSummary
In the Linux kernel, the RDMA/mana_ib module has a use-after-free during partial table insertion of a QP. mana_table_store_ud_qp() publishes a QP before inserting the receive-queue id, dropping the XArray lock, allowing a concurrent completion handler to take a transient reference; when the second insertion fails, rollback erases only the send-queue entry, leaving references outstanding and causing a use-after-free.
Risk Assessment
Can cause kernel memory corruption, system instability, or potential privilege escalation in environments using RDMA mana_ib.
Recommendation
Update the Linux kernel to a version with the fix that properly drains QP references after a failed table insertion. Restrict RDMA operations to trusted users until patched.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS