CVE-2025-37915 net_sched: drr: Fix double list add in class with netem as child qdisc

In the Linux kernel, the following vulnerability has been resolved: netsched: drr: Fix double list add in class with netem as child qdisc As described in Gerrard's report 1, there are use cases where a netem child qdisc will make the parent qdisc's enqueue callback reentrant. In the case of drr,...

CVE-2025-37914

CVE-2025-37914 is a Linux kernel network scheduler vulnerability in net_sched: ets where a netem child qdisc can trigger reentrant enqueue, causing the same classifier to be added twice to the active_list and potentially memory corruption. The patch adds an active check (cl_is_active) and guards ...