In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: fix nftcountersenabled underflow at nftablesaddchain() syzbot is reporting underflow of nftcountersenabled counter at nftablesaddchain() [1], for commit 43eb8949cfdffa76 ("netfilter: nftables: do not leave chain stats enabled on error") missed that nftableschaindestroy() after nftbasechaininit() in the error path of nftablesaddchain() decrements the counter because nftbasechaininit() makes nftisbasechain() return true by setting NFTCHAINBASE flag. Increment the counter immediately after returning from nftbasechaininit().