{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-41042",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-41042"
  ],
  "published": "2024-07-29T14:32:49Z",
  "summary": "netfilter: nf_tables: prefer nft_chain_validate",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: prefer nft_chain_validate\n\nnft_chain_validate already performs loop detection because a cycle will\nresult in a call stack overflow (ctx->level >= NFT_JUMP_STACK_SIZE).\n\nIt also follows maps via ->validate callback in nft_lookup, so there\nappears no reason to iterate the maps again.\n\nnf_tables_check_loops() and all its helper functions can be removed.\nThis improves ruleset load time significantly, from 23s down to 12s.\n\nThis also fixes a crash bug. Old loop detection code can result in\nunbounded recursion:\n\nBUG: TASK stack guard page was hit at ....\nOops: stack guard page: 0000 [#1] PREEMPT SMP KASAN\nCPU: 4 PID: 1539 Comm: nft Not tainted 6.10.0-rc5+ #1\n[..]\n\nwith a suitable ruleset during validation of register stores.\n\nI can't see any actual reason to attempt to check for this from\nnft_validate_register_store(), at this point the transaction is still in\nprogress, so we don't have a full picture of the rule graph.\n\nFor nf-next it might make sense to either remove it or make this depend\non table->validate_state in case we could catch an error earlier\n(for improved error reporting to userspace).",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-41042"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1947e4c3346faa8ac7e343652c0fd3b3e394202f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cd4348e0a50286282c314ad6d2b0740e7c812c24"
    },
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      "url": "https://git.kernel.org/stable/c/31c35f9f89ef585f1edb53e17ac73a0ca4a9712b"
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      "url": "https://git.kernel.org/stable/c/8246b7466c8da49d0d9e85e26cbd69dd6d3e3d1e"
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      "url": "https://git.kernel.org/stable/c/b6b6e430470e1c3c5513311cb35a15a205595abe"
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    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
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}