ghsa-975c-w82q-mxhv
Vulnerability from github
Published
2024-11-08 06:30
Modified
2024-11-19 18:30
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:

posix-clock: posix-clock: Fix unbalanced locking in pc_clock_settime()

If get_clock_desc() succeeds, it calls fget() for the clockid's fd, and get the clk->rwsem read lock, so the error path should release the lock to make the lock balance and fput the clockid's fd to make the refcount balance and release the fd related resource.

However the below commit left the error path locked behind resulting in unbalanced locking. Check timespec64_valid_strict() before get_clock_desc() to fix it, because the "ts" is not changed after that.

[pabeni@redhat.com: fixed commit message typo]

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{
  "affected": [],
  "aliases": [
    "CVE-2024-50210"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-08T06:15:17Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nposix-clock: posix-clock: Fix unbalanced locking in pc_clock_settime()\n\nIf get_clock_desc() succeeds, it calls fget() for the clockid\u0027s fd,\nand get the clk-\u003erwsem read lock, so the error path should release\nthe lock to make the lock balance and fput the clockid\u0027s fd to make\nthe refcount balance and release the fd related resource.\n\nHowever the below commit left the error path locked behind resulting in\nunbalanced locking. Check timespec64_valid_strict() before\nget_clock_desc() to fix it, because the \"ts\" is not changed\nafter that.\n\n[pabeni@redhat.com: fixed commit message typo]",
  "id": "GHSA-975c-w82q-mxhv",
  "modified": "2024-11-19T18:30:54Z",
  "published": "2024-11-08T06:30:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50210"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ba33b327c3f88a7baee598979d73ab5b44d41cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f063bbf1ee6b01611c016b54e050a41506eb794"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e62807c7fbb3c758d233018caf94dfea9c65dbd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a8219446b95a859488feaade674d13f9efacfa32"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b27330128eca25179637c1816d5a72d6cc408c66"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7fcfdba35abc9f39b83080c2bce398dad13a943"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d005400262ddaf1ca1666bbcd1acf42fe81d57ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e56e0ec1b79f5a6272c6e78b36e9d593aa0449af"
    }
  ],
  "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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