In the Linux kernel, the following vulnerability has been resolved: net: sched: fix ordering of qlen adjustment Changes to sch->q.qlen around qdisc_tree_reduce_backlog() need to happen _before_ a call to said function because otherwise it may fail to notify parent qdiscs when the child is about to become empty.
https://git.kernel.org/stable/c/e3e54ad9eff8bdaa70f897e5342e34b76109497f
https://git.kernel.org/stable/c/97e13434b5da8e91bdf965352fad2141d13d72d3
https://git.kernel.org/stable/c/5eb7de8cd58e73851cd37ff8d0666517d9926948
https://git.kernel.org/stable/c/5e473f462a16f1a34e49ea4289a667d2e4f35b52
https://git.kernel.org/stable/c/489422e2befff88a1de52b2acebe7b333bded025
https://git.kernel.org/stable/c/44782565e1e6174c94bddfa72ac7267cd09c1648
https://git.kernel.org/stable/c/33db36b3c53d0fda2699ea39ba72bee4de8336e8