GHSA-GGHQ-R38G-RG55

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-20 15:31
VLAI
Details

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

ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()

ipv4_sysctl_exit_net() is currently freeing net->ipv4.sysctl_local_reserved_ports too soon.

Only after unregister_net_sysctl_table() we can be sure no threads can possibly use the sysctls, including /proc/sys/net/ipv4/ip_local_reserved_ports.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2026-64002"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:39Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: free net-\u003eipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()\n\nipv4_sysctl_exit_net() is currently freeing net-\u003eipv4.sysctl_local_reserved_ports\ntoo soon.\n\nOnly after unregister_net_sysctl_table() we can be sure no threads can possibly\nuse the sysctls, including /proc/sys/net/ipv4/ip_local_reserved_ports.",
  "id": "GHSA-gghq-r38g-rg55",
  "modified": "2026-07-20T15:31:54Z",
  "published": "2026-07-19T18:31:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64002"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/155f90be5ee8be5b110ebc0b7da33c54c83b0208"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5b23a2ff379e70b6b9ff744a972b63e1f8f4d996"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6512c57c4638ddec113bf42439361ba85a12048d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87a1e0fe7776da7ab411be332b4be58ac8840d10"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a7f4eefb6e1458431eef9fa20fb363320d185f76"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ecf45080a4d3f4526cacb8b14060fe3b49a6913b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.