ghsa-mfw5-pp35-j4h8
Vulnerability from github
Published
2024-03-03 00:30
Modified
2024-11-07 18:31
Severity ?
6.3 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
Details

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

netfilter: nf_tables: fix memleak when more than 255 elements expired

When more than 255 elements expired we're supposed to switch to a new gc container structure.

This never happens: u8 type will wrap before reaching the boundary and nft_trans_gc_space() always returns true.

This means we recycle the initial gc container structure and lose track of the elements that came before.

While at it, don't deref 'gc' after we've passed it to call_rcu.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-52581"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-02T22:15:49Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: fix memleak when more than 255 elements expired\n\nWhen more than 255 elements expired we\u0027re supposed to switch to a new gc\ncontainer structure.\n\nThis never happens: u8 type will wrap before reaching the boundary\nand nft_trans_gc_space() always returns true.\n\nThis means we recycle the initial gc container structure and\nlose track of the elements that came before.\n\nWhile at it, don\u0027t deref \u0027gc\u0027 after we\u0027ve passed it to call_rcu.",
  "id": "GHSA-mfw5-pp35-j4h8",
  "modified": "2024-11-07T18:31:19Z",
  "published": "2024-03-03T00:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52581"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09c85f2d21ab6b5acba31a037985b13e8e6565b8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4aea243b6853d06c1d160a9955b759189aa02b14"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7cf055b43756b10aa2b851c927c940f5ed652125"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7e5d732e6902eb6a37b35480796838a145ae5f07"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a995a68e8a3b48533e47c856865d109a1f1a9d01"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf5000a7787cbc10341091d37245a42c119d26c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef99506eaf1dc31feff1adfcfd68bc5535a22171"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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