CVE-2026-63858

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netfilter: nf_tables: add hook transactions for device deletions<br /> <br /> Restore the flag that indicates that the hook is going away, ie.<br /> NFT_HOOK_REMOVE, but add a new transaction object to track deletion<br /> of hooks without altering the basechain/flowtable hook_list during<br /> the preparation phase.<br /> <br /> The existing approach that moves the hook from the basechain/flowtable<br /> hook_list to transaction hook_list breaks netlink dump path readers<br /> of this RCU-protected list.<br /> <br /> It should be possible use an array for nft_trans_hook to store the<br /> deleted hooks to compact the representation but I am not expecting<br /> many hook object, specially now that wildcard support for devices<br /> is in place.<br /> <br /> Note that the nft_trans_chain_hooks() list contains a list of struct<br /> nft_trans_hook objects for DELCHAIN and DELFLOWTABLE commands, while<br /> this list stores struct nft_hook objects for NEWCHAIN and NEWFLOWTABLE.<br /> Note that new commands can be updated to use nft_trans_hook for<br /> consistency.<br /> <br /> This patch also adapts the event notification path to deal with the list<br /> of hook transactions.