CVE-2026-63858 (GCVE-0-2026-63858)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:04 – Updated: 2026-07-20 13:40
VLAI
Title
netfilter: nf_tables: add hook transactions for device deletions
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b6d9014a3335194590abdd2a2471ef5147a67645 , < 4e69bfb32b2db323d9205fdb30e284481b37817c (git)
Affected: b6d9014a3335194590abdd2a2471ef5147a67645 , < 10f79dbd7719d1da9f5884d13060322d8729f091 (git)
Affected: 7a248f9c74f9f62799718c12efd9e9e391d60b6f (git)
Affected: f275989ad04159dbfc62cefb65ba9c5ba1d7c34f (git)
Affected: 62d91062058b42bf70b2c3446aec397bb0ce15ee (git)
Affected: 99180dec5ae582227219d1fdd0dd5ccf53ec7491 (git)
Affected: 5.10.122 , < 5.11 (semver)
Affected: 5.15.47 , < 5.16 (semver)
Affected: 5.17.15 , < 5.18 (semver)
Affected: 5.18.4 , < 5.19 (semver)
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Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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{
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    "datePublished": "2026-07-19T14:04:46.967Z",
    "dateReserved": "2026-07-19T07:54:57.016Z",
    "dateUpdated": "2026-07-20T13:40:55.475Z",
    "state": "PUBLISHED"
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      "current_release_date": "2026-07-21T19:03:59+00:00",
      "cve": "CVE-2026-63858",
      "id": "CVE-2026-63858",
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    }
  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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