CVE-2026-72342

Technical Description

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

net/mlx5e: Fix HV VHCA stats agent registration race

mlx5e_hv_vhca_stats_create() registers the stats agent through

mlx5_hv_vhca_agent_create(). The helper publishes the agent in

hv_vhca->agents[type] under agents_lock and immediately schedules an

asynchronous control invalidation on the HV VHCA workqueue before

returning to mlx5e.

The asynchronous invalidation invokes the control agent's invalidate

callback, which reads the hypervisor control block and forwards the

command to mlx5e_hv_vhca_stats_control(). That callback may either:

- call cancel_delayed_work_sync(&priv->stats_agent.work), or

- call queue_delayed_work(priv->wq, &sagent->work, sagent->delay).

However, the delayed_work and priv->stats_agent.agent are only

initialized after mlx5_hv_vhca_agent_create() returns to mlx5e:

agent = mlx5_hv_vhca_agent_create(...); /* publish + invalidate */

...

priv->stats_agent.agent = agent; /

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