In the Linux kernel, the following vulnerability has been resolved: netfilter: bpf: defer hook memory release until rcu readers are done Yiming Qian reports UaF when concurrent process is dumping hooks via nfnetlinkhooks: BUG: KASAN: slab-use-after-free in nfnlhookdumpone.isra.0+0xe71/0x10f0 Read of size 8 at addr ffff888003edbf88 by task poc/79 Call Trace: <TASK> nfnlhookdumpone.isra.0+0xe71/0x10f0 netlinkdump+0x554/0x12b0 nfnlhookget+0x176/0x230 [..] Defer release until after concurrent readers have completed.