EUVD-2026-39215

In the Linux kernel, the following vulnerability has been resolved: net/sched: actapi: use RCU with deferred freeing for action lifecycle When NEWTFILTER and DELFILTER are run concurrently it is possible to create a race with an associated action. Let's illustrate with CPU0 running NEWTFILTER and...

CVE-2026-53264

CVE-2026-53264 (Linux kernel net/sched: act_api) describes a race between NEWTFILTER and DELFILTER that could cause use-after-free when freeing an action. The root cause is timing around IDR removal and immediate kfree(p) without deferral. The documented fix defers final kfree() via RCU, adding a...