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CVE-2026-52988 (GCVE-0-2026-52988)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-08-05 12:32
VLAI
Title
netfilter: nf_tables: join hook list via splice_list_rcu() in commit phase
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: join hook list via splice_list_rcu() in commit phase Publish new hooks in the list into the basechain/flowtable using splice_list_rcu() to ensure netlink dump list traversal via rcu is safe while concurrent ruleset update is going on.
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 78d9f48f7f44431a25da2b46b3a8812f6ff2b981 , < 1346be9379639c30877083b12747d4eacb83c24f (git)
Affected: 78d9f48f7f44431a25da2b46b3a8812f6ff2b981 , < a6134e62dba2ea4f760b29d5226907f447c92400 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website

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          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_tables_api.c"
          ],
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              "value": "AV:L - Reachability is through nfnetlink/nftables netlink operations (`NFT_MSG_NEWCHAIN`/`NEWFLOWTABLE` and concurrent `GETCHAIN`/`GETFLOWTABLE` dumps), which require local ability to send netlink messages.\nAC:L - The bug is a race between an attacker-controlled ruleset update and an attacker-controlled concurrent RCU dump; both sides can be generated repeatedly from local processes.\nPR:L - nfnetlink checks `CAP_NET_ADMIN` in the target network namespace, and nftables/netfilter administration is reachable from unprivileged users via user+network namespaces on affected configurations.\nUI:N - No victim interaction is required; the attacker triggers both the update and dump operations directly.\nS:U - The impact remains within the kernel/local host security authority and does not cross a VM, IOMMU, or separate security-scope boundary.\nC:H - Unsafe non-RCU list publication can make an RCU netlink dump interpret a transaction list head or freed transaction memory as `struct nft_hook`, leading to out-of-bounds/use-after-free reads returned through netlink hook device-name serialization.\nI:N - The reachable affected dump path reads hook-list entries and serializes names; I did not find a defensible attacker-controlled write or control-flow primitive from this bug.\nA:H - The malformed RCU traversal can dereference invalid/freed memory or loop over an inconsistent list, making kernel oops, panic, or soft lockup a plausible outcome."
            }
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          "url": "https://git.kernel.org/stable/c/1346be9379639c30877083b12747d4eacb83c24f"
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    "dateReserved": "2026-06-09T07:44:35.376Z",
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    "state": "PUBLISHED"
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      "initial_release_date": "2026-06-27T01:19:33.000Z",
      "product_status:known_affected": "4",
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      "status": "final",
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      "version": "10"
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}



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