CVE-2026-63858

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

• linux linux kernel (>= 5.10.122 < 5.11) • linux linux kernel (>= 5.15.47 < 5.16) • linux linux kernel (>= 5.17.15 < 5.18) • linux linux kernel (>= 5.18.4 < 5.19) • linux linux kernel (>= 5.19.1 < 6.18.57) • linux linux kernel (>= 6.19 < 7.0.10) • linux linux kernel 5.19 • linux linux kernel 7.1