ghsa-q52q-f54c-xmvp
Vulnerability from github
Published
2024-02-26 18:30
Modified
2024-04-17 21:30
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:

net: hso: fix NULL-deref on disconnect regression

Commit 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device unregistration") fixed the racy minor allocation reported by syzbot, but introduced an unconditional NULL-pointer dereference on every disconnect instead.

Specifically, the serial device table must no longer be accessed after the minor has been released by hso_serial_tty_unregister().

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{
  "affected": [],
  "aliases": [
    "CVE-2021-46905"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-02-26T16:27:45Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hso: fix NULL-deref on disconnect regression\n\nCommit 8a12f8836145 (\"net: hso: fix null-ptr-deref during tty device\nunregistration\") fixed the racy minor allocation reported by syzbot, but\nintroduced an unconditional NULL-pointer dereference on every disconnect\ninstead.\n\nSpecifically, the serial device table must no longer be accessed after\nthe minor has been released by hso_serial_tty_unregister().",
  "id": "GHSA-q52q-f54c-xmvp",
  "modified": "2024-04-17T21:30:45Z",
  "published": "2024-02-26T18:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46905"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c71d4c89559f72cec2592d078681a843bce570e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f000005da31f6947f843ce6b3e3a960540c6e00"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24b699bea7553fc0b98dad9d864befb6005ac7f1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2ad5692db72874f02b9ad551d26345437ea4f7f3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41c44e1f3112d7265dae522c026399b2a42d19ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5871761c5f0f20d6e98bf3b6bd7486d857589554"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5c17cfe155d21954b4c7e2a78fa771cebcd86725"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/90642ee9eb581a13569b1c0bd57e85d962215273"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7fad2ce15bdbbd0fec3ebe999fd7cab2267f53e"
    }
  ],
  "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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