CVE-2026-97613

/// Technical description

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

net: mana: Reserve extra CQ slot for the fence completion CQE

The RX completion queue is sized to hold exactly one CQE per posted RX WQE.

MANA_FENCE_RQ makes hardware post an additional CQE_RX_OBJECT_FENCE after

the packet CQEs. The current sizing reserves no extra slot for it and in

rare cases, CQ has no guaranteed slot for the fence CQE when it is full of

packet CQEs. This can lead to dropping the fence completion while the

driver waits holding RTNL lock throughout the timeout duration.

Reserve one extra CQE slot for CQE_RX_OBJECT_FENCE. mana_gd_alloc_memory()

requires queue_size to be a power-of-two and at least MANA_PAGE_SIZE;

the reservation pushes cq_size past a power-of-two, so round up the CQ size

in mana_create_rxq().

/// 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