CVE-2026-23412

Description

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 nfnetlink_hooks: BUG: KASAN: slab-use-after-free in nfnl_hook_dump_one.isra.0+0xe71/0x10f0 Read of size 8 at addr ffff888003edbf88 by task poc/79 Call Trace: <TASK> nfnl_hook_dump_one.isra.0+0xe71/0x10f0 netlink_dump+0x554/0x12b0 nfnl_hook_get+0x176/0x230 [..] Defer release until after concurrent readers have completed.

References

• https://git.kernel.org/stable/c/24f90fa3994b992d1a09003a3db2599330a5232a
• https://git.kernel.org/stable/c/54244d54a971c26a0cd0a9073460ff71f3c51b32
• https://git.kernel.org/stable/c/c25e0dec366ae99b7264324ce3c7cbaea34691f9
• https://git.kernel.org/stable/c/cb2bf5efdb02a2a59faf603604a1066e8266f349
• https://git.kernel.org/stable/c/d016c216bc75c45128160593a77b864a04dbe7c0