CVE-2026-97616

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

net/sched: act api: release all action references on NEWACTION failure

When a batched RTM NEWACTION request replaces an existing action, tcf idr check alloc() takes a temporary reference on it. If a later action fails to initialize, tcf action destroy() uses strict release semantics to clean up the actions initialized so far. For an action bound to a filter, the strict check returns -EPERM without dropping the temporary reference.

This error also makes tcf action destroy() return before releasing subsequent entries. Any new action initialized between the bound action and the failing entry is leaked together with its reserved IDR slot, preventing reuse of its index.

Use tcf idr release() to drop each reference held by the batch without rejecting bound actions. This allows cleanup to continue through all initialized entries and preserves the module reference release when an action is destroyed. Explicit action deletion and flushing retain their separate bind-count checks.