CVE-2026-63858 (GCVE-0-2026-63858)
Vulnerability from cvelistv5
Published
2026-07-19 14:04
Modified
2026-10-19 20:07
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: b6d9014a3335194590abdd2a2471ef5147a67645
Version: b6d9014a3335194590abdd2a2471ef5147a67645
Version: b6d9014a3335194590abdd2a2471ef5147a67645
Version: 7a248f9c74f9f62799718c12efd9e9e391d60b6f
Version: f275989ad04159dbfc62cefb65ba9c5ba1d7c34f
Version: 62d91062058b42bf70b2c3446aec397bb0ce15ee
Version: 99180dec5ae582227219d1fdd0dd5ccf53ec7491
Version: 5.10.122   ≤
Version: 5.15.47   ≤
Version: 5.17.15   ≤
Version: 5.18.4   ≤
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