ghsa-4x56-gm9r-89mg
Vulnerability from github
Published
2024-07-12 15:31
Modified
2025-10-06 21:30
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:

x86/kexec: Fix bug with call depth tracking

The call to cc_platform_has() triggers a fault and system crash if call depth tracking is active because the GS segment has been reset by load_segments() and GS_BASE is now 0 but call depth tracking uses per-CPU variables to operate.

Call cc_platform_has() earlier in the function when GS is still valid.

[ bp: Massage. ]

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{
  "affected": [],
  "aliases": [
    "CVE-2024-40944"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-12T13:15:16Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/kexec: Fix bug with call depth tracking\n\nThe call to cc_platform_has() triggers a fault and system crash if call depth\ntracking is active because the GS segment has been reset by load_segments() and\nGS_BASE is now 0 but call depth tracking uses per-CPU variables to operate.\n\nCall cc_platform_has() earlier in the function when GS is still valid.\n\n  [ bp: Massage. ]",
  "id": "GHSA-4x56-gm9r-89mg",
  "modified": "2025-10-06T21:30:27Z",
  "published": "2024-07-12T15:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40944"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2cfb464669b645a9b98478b74f2bcea9860dcff1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/93c1800b3799f17375989b0daf76497dd3e80922"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d91ddd05082691e69b30744825d18ae799293258"
    }
  ],
  "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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