ghsa-m5q9-gx2f-vvf3
Vulnerability from github
Published
2024-09-04 21:30
Modified
2024-09-06 18:31
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:

xen: privcmd: Switch from mutex to spinlock for irqfds

irqfd_wakeup() gets EPOLLHUP, when it is called by eventfd_release() by way of wake_up_poll(&ctx->wqh, EPOLLHUP), which gets called under spin_lock_irqsave(). We can't use a mutex here as it will lead to a deadlock.

Fix it by switching over to a spin lock.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2024-44957"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-09-04T19:15:30Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen: privcmd: Switch from mutex to spinlock for irqfds\n\nirqfd_wakeup() gets EPOLLHUP, when it is called by\neventfd_release() by way of wake_up_poll(\u0026ctx-\u003ewqh, EPOLLHUP), which\ngets called under spin_lock_irqsave(). We can\u0027t use a mutex here as it\nwill lead to a deadlock.\n\nFix it by switching over to a spin lock.",
  "id": "GHSA-m5q9-gx2f-vvf3",
  "modified": "2024-09-06T18:31:28Z",
  "published": "2024-09-04T21:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-44957"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1c682593096a487fd9aebc079a307ff7a6d054a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49f2a5da6785b2dbde93e291cae037662440346e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2775ae4d9227729f8ca9ee2a068f62a00d5ea9c"
    }
  ],
  "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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