ghsa-4c9c-638j-jrpm
Vulnerability from github
Published
2025-12-24 12:30
Modified
2025-12-24 12:30
Details

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

gpu: host1x: Fix race in syncpt alloc/free

Fix race condition between host1x_syncpt_alloc() and host1x_syncpt_put() by using kref_put_mutex() instead of kref_put() + manual mutex locking.

This ensures no thread can acquire the syncpt_mutex after the refcount drops to zero but before syncpt_release acquires it. This prevents races where syncpoints could be allocated while still being cleaned up from a previous release.

Remove explicit mutex locking in syncpt_release as kref_put_mutex() handles this atomically.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-68732"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T11:16:02Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpu: host1x: Fix race in syncpt alloc/free\n\nFix race condition between host1x_syncpt_alloc()\nand host1x_syncpt_put() by using kref_put_mutex()\ninstead of kref_put() + manual mutex locking.\n\nThis ensures no thread can acquire the\nsyncpt_mutex after the refcount drops to zero\nbut before syncpt_release acquires it.\nThis prevents races where syncpoints could\nbe allocated while still being cleaned up\nfrom a previous release.\n\nRemove explicit mutex locking in syncpt_release\nas kref_put_mutex() handles this atomically.",
  "id": "GHSA-4c9c-638j-jrpm",
  "modified": "2025-12-24T12:30:30Z",
  "published": "2025-12-24T12:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68732"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4e6e07ce0197aecfb6c4a62862acc93b3efedeb7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79197c6007f2afbfd7bcf5b9b80ccabf8483d774"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7d393267c497502fa737607f435f05dfe6e3d9b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d138f73ffb0c57ded473c577719e6e551b7b1f27"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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