CVE-2026-63858

CVE CVE-2026-63858EUVD EUVD-2026-45542Published 2026-07-19T14:04:46.000ZLast changed 2026-08-05T12:36:37.000ZCVSS 7.8

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux b6d9014a3335194590abdd2a2471ef5147a67645 <4e69bfb32b2db323d9205fdb30e284481b37817c; f275989ad04159dbfc62cefb65ba9c5ba1d7c34f; 62d91062058b42bf70b2c3446aec397bb0ce15ee; b6d9014a3335194590abdd2a2471ef5147a67645 <10f79dbd7719d1da9f5884d13060322d8729f091; 5.15.47 <5.16; patch: 7.1; 5.17.15 <5.18; 99180dec5ae582227219d1fdd0dd5ccf53ec7491; 5.10.122 <5.11; 5.19; patch: 0; 7a248f9c74f9f62799718c12efd9e9e391d60b6f; patch: 7.0.10; 5.18.4 <5.19

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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