ghsa-pcw3-hvmm-479h
Vulnerability from github
Published
2025-10-04 18:31
Modified
2025-10-04 18:31
Details

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nft_set_rbtree: fix null deref on element insertion

There is no guarantee that rb_prev() will not return NULL in nft_rbtree_gc_elem():

general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] nft_add_set_elem+0x14b0/0x2990 nf_tables_newsetelem+0x528/0xb30

Furthermore, there is a possible use-after-free while iterating, 'node' can be free'd so we need to cache the next value to use.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53566"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-04T16:15:52Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_rbtree: fix null deref on element insertion\n\nThere is no guarantee that rb_prev() will not return NULL in nft_rbtree_gc_elem():\n\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]\n nft_add_set_elem+0x14b0/0x2990\n  nf_tables_newsetelem+0x528/0xb30\n\nFurthermore, there is a possible use-after-free while iterating,\n\u0027node\u0027 can be free\u0027d so we need to cache the next value to use.",
  "id": "GHSA-pcw3-hvmm-479h",
  "modified": "2025-10-04T18:31:15Z",
  "published": "2025-10-04T18:31:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53566"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3fa13203b6d90cc3a33af47b058739f92ab82eef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61ae320a29b0540c16931816299eb86bf2b66c08"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/899aa5638568abf5d69de7a7bb95e4615157375b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a337706c1fb35aac3f26b48aca80421bdbe1d33a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a836be60a3aabcedcd9c79f545d409ace1f20ba6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec5caa765f7f6960011c919c9aeb1467940421f6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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