GHSA-RR3F-V8J5-MMR6

Vulnerability from github – Published: 2024-05-21 15:31 – Updated: 2025-04-30 15:30
VLAI?
Details

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

udp: fix race between close() and udp_abort()

Kaustubh reported and diagnosed a panic in udp_lib_lookup(). The root cause is udp_abort() racing with close(). Both racing functions acquire the socket lock, but udp{v6}_destroy_sock() release it before performing destructive actions.

We can't easily extend the socket lock scope to avoid the race, instead use the SOCK_DEAD flag to prevent udp_abort from doing any action when the critical race happens.

Diagnosed-and-tested-by: Kaustubh Pandey kapandey@codeaurora.org

Severity ?
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2021-47248"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T15:15:13Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nudp: fix race between close() and udp_abort()\n\nKaustubh reported and diagnosed a panic in udp_lib_lookup().\nThe root cause is udp_abort() racing with close(). Both\nracing functions acquire the socket lock, but udp{v6}_destroy_sock()\nrelease it before performing destructive actions.\n\nWe can\u0027t easily extend the socket lock scope to avoid the race,\ninstead use the SOCK_DEAD flag to prevent udp_abort from doing\nany action when the critical race happens.\n\nDiagnosed-and-tested-by: Kaustubh Pandey \u003ckapandey@codeaurora.org\u003e",
  "id": "GHSA-rr3f-v8j5-mmr6",
  "modified": "2025-04-30T15:30:42Z",
  "published": "2024-05-21T15:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47248"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f73448041bd0682d4b552cfd314ace66107f1ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a88477c1c85e4baa51e91f2d40f2166235daa56"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/65310b0aff86980a011c7c7bfa487a333d4ca241"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8729ec8a2238152a4afc212a331a6cd2c61aeeac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0882f68f54f7a8b6308261acee9bd4faab5a69e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a8b897c7bcd47f4147d066e22cc01d1026d7640e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3c36c773aed0fef8b1d3d555b43393ec564400f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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