CVE-2026-98235

/// Technical description

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

net/sched: act_api: release tail references on DELACTION failure

A batched RTM_DELACTION request takes a temporary reference on each

action before attempting any deletion. tcf_action_delete() clears

each processed slot and drops its temporary reference before attempting

the deletion. If deletion fails, tca_action_gd() calls

tcf_action_put_many() to release the remaining references, but its

tcf_act_for_each_action() iterator stops at the first NULL slot.

When a batch stops at an action bound to a filter, this leaks a

reference on each subsequent action. A later delete of an unbound

action can then return success without removing it from the IDR.

Walk the full array in tcf_action_put_many() and skip NULL slots to

release the references held on the unprocessed actions.

/// 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