Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: reject duplicate device on updates A chain/flowtable update with duplicated devices in the same batch is possible. Unfortunately, netdev event path only removes the first device that is found, leaving unregistered the hook of the duplicated device. Check if a duplicated device exists in the transaction batch, bail out with EEXIST in such case. WARNING is hit when unregistering the hook: [49042.221275] WARNING: CPU: 4 PID: 8425 at net/netfilter/core.c:340 nf_hook_entry_head+0xaa/0x150 [49042.221375] CPU: 4 UID: 0 PID: 8425 Comm: nft Tainted: G S 6.16.0+ #170 PREEMPT(full) [...] [49042.221382] RIP: 0010:nf_hook_entry_head+0xaa/0x150
Product status
78d9f48f7f44431a25da2b46b3a8812f6ff2b981 before d7615bde541f16517d6790412da6ec46fa8a4c1f
78d9f48f7f44431a25da2b46b3a8812f6ff2b981 before cf5fb87fcdaaaafec55dcc0dc5a9e15ead343973
5.8
Any version before 5.8
6.16.2
6.17
References
git.kernel.org/...c/d7615bde541f16517d6790412da6ec46fa8a4c1f
git.kernel.org/...c/cf5fb87fcdaaaafec55dcc0dc5a9e15ead343973
