GHSA-MGX5-JRHQ-G7RG

Vulnerability from github – Published: 2024-04-03 15:30 – Updated: 2025-11-03 21:31
VLAI
Details

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

fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats

lock_task_sighand() can trigger a hard lockup. If NR_CPUS threads call do_task_stat() at the same time and the process has NR_THREADS, it will spin with irqs disabled O(NR_CPUS * NR_THREADS) time.

Change do_task_stat() to use sig->stats_lock to gather the statistics outside of ->siglock protected section, in the likely case this code will run lockless.

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-2024-26686"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-04-03T15:15:52Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/proc: do_task_stat: use sig-\u003estats_lock to gather the threads/children stats\n\nlock_task_sighand() can trigger a hard lockup.  If NR_CPUS threads call\ndo_task_stat() at the same time and the process has NR_THREADS, it will\nspin with irqs disabled O(NR_CPUS * NR_THREADS) time.\n\nChange do_task_stat() to use sig-\u003estats_lock to gather the statistics\noutside of -\u003esiglock protected section, in the likely case this code will\nrun lockless.",
  "id": "GHSA-mgx5-jrhq-g7rg",
  "modified": "2025-11-03T21:31:01Z",
  "published": "2024-04-03T15:30:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26686"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c35d1914353799c54fa1843fe7dea6fcbcdbac5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3820b0fac7732a653bcc6f6ac20c1d72e697f8f6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4fe85bdaabd63f8f8579b24a10ed597c9c482164"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4d"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
    }
  ],
  "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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