Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: make hash table per queue Sharing a global hash table among all queues is tempting, but it can cause crash: BUG: KASAN: slab-use-after-free in nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] [..] nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] nfnetlink_rcv_msg+0x46a/0x930 kmem_cache_alloc_node_noprof+0x11e/0x450 struct nf_queue_entry is freed via kfree, but parallel cpu can still encounter such an nf_queue_entry when walking the list. Alternative fix is to free the nf_queue_entry via kfree_rcu() instead, but as we have to alloc/free for each skb this will cause more mem pressure.
Product status
371de2bef6582a3f58049b3d18e190924af9c9a0 (git) before 22730cb96093b5be0609063bbb1923dbecd61252
870e3e63da8e88daffe9d692a025c711658018a8 (git) before 41e3652a178cb0eecd48e0e6e27fbb73a004046a
70e2e3ce4f6841e12ec1c104fc76c0e707398ec4 (git) before 9e5ebef91120d2764aefe557c3a484b6288f341f
e19079adcd26a25d7d3e586b1837493361fdf8b6 (git) before 936206e3f6ff411581e615e930263d6f8b78df9d
6.12.75 (semver) before 6.12.83
6.18.14 (semver) before 6.18.24
6.19.4 (semver) before 6.19.14
References
git.kernel.org/...c/22730cb96093b5be0609063bbb1923dbecd61252
git.kernel.org/...c/41e3652a178cb0eecd48e0e6e27fbb73a004046a
git.kernel.org/...c/9e5ebef91120d2764aefe557c3a484b6288f341f
git.kernel.org/...c/936206e3f6ff411581e615e930263d6f8b78df9d