GHSA-MXVM-X858-3GM2

Vulnerability from github – Published: 2024-04-28 15:30 – Updated: 2024-10-29 18:30
VLAI?
Details

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

s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup

Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL.

The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held.

Fix by checking the pavgroup pointer with lcu->lock held.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2022-48636"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-04-28T13:15:06Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup\n\nFix Oops in dasd_alias_get_start_dev() function caused by the pavgroup\npointer being NULL.\n\nThe pavgroup pointer is checked on the entrance of the function but\nwithout the lcu-\u003elock being held. Therefore there is a race window\nbetween dasd_alias_get_start_dev() and _lcu_update() which sets\npavgroup to NULL with the lcu-\u003elock held.\n\nFix by checking the pavgroup pointer with lcu-\u003elock held.",
  "id": "GHSA-mxvm-x858-3gm2",
  "modified": "2024-10-29T18:30:34Z",
  "published": "2024-04-28T15:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48636"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2e473351400e3dd66f0b71eddcef82ee45a584c1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49f401a98b318761ca2e15d4c7869a20043fbed4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/650a2e79d176db753654d3dde88e53a2033036ac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aaba5ff2742043705bc4c02fd0b2b246e2e16da1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d3a67c21b18f33c79382084af556557c442f12a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d86b4267834e6d4af62e3073e48166e349ab1b70"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db7ba07108a48c0f95b74fabbfd5d63e924f992d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f5fcc9d6d71d9ff7fdbdd4b89074e6e24fffc20b"
    }
  ],
  "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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