CVE-2026-97477

/// Technical description

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

RDMA/counter: Fix num_counters leak on bind_qp failure in alloc_and_bind()

When __rdma_counter_bind_qp() fails in alloc_and_bind(), the error path

jumps to err_mode which frees the counter without decrementing

port_counter->num_counters. The only place that decrements is

rdma_counter_free(), which is unreachable since the counter was never

successfully bound.

This leak accumulates across repeated failures, permanently preventing

the port from switching to AUTO mode (-EBUSY in __counter_set_mode())

and blocking the MANUAL→NONE auto-revert in rdma_counter_free(). When

the mode was NONE before the call, the MANUAL mode set by

__counter_set_mode() also leaks since the revert logic is never

reached.

Add an err_bind label between the num_counters increment and the

existing err_mode label. It decrements num_counters and mirrors the

MANUAL→NONE revert from rdma_counter_free(), ensuring the port state

is fully restored on b

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References