ghsa-w9f5-vpqq-grqj
Vulnerability from github
Published
2025-01-19 12:31
Modified
2025-11-03 21:32
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

netfilter: conntrack: clamp maximum hashtable size to INT_MAX

Use INT_MAX as maximum size for the conntrack hashtable. Otherwise, it is possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof() when resizing hashtable because __GFP_NOWARN is unset. See:

0708a0afe291 ("mm: Consider __GFP_NOWARN flag for oversized kvmalloc() calls")

Note: hashtable resize is only possible from init_netns.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21648"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-19T11:15:10Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: clamp maximum hashtable size to INT_MAX\n\nUse INT_MAX as maximum size for the conntrack hashtable. Otherwise, it\nis possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof() when\nresizing hashtable because __GFP_NOWARN is unset. See:\n\n  0708a0afe291 (\"mm: Consider __GFP_NOWARN flag for oversized kvmalloc() calls\")\n\nNote: hashtable resize is only possible from init_netns.",
  "id": "GHSA-w9f5-vpqq-grqj",
  "modified": "2025-11-03T21:32:13Z",
  "published": "2025-01-19T12:31:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21648"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5552b4fd44be3393b930434a7845d8d95a2a3c33"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a965f7f0ea3ae61b9165bed619d5d6da02c75f80"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b1b2353d768f1b80cd7fe045a70adee576b9b338"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b541ba7d1f5a5b7b3e2e22dc9e40e18a7d6dbc13"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d5807dd1328bbc86e059c5de80d1bbee9d58ca3d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f559357d035877b9d0dcd273e0ff83e18e1d46aa"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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