ghsa-jj48-3v62-2vf9
Vulnerability from github
Published
2024-03-03 00:30
Modified
2024-11-01 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:

x86/mm, kexec, ima: Use memblock_free_late() from ima_free_kexec_buffer()

The code calling ima_free_kexec_buffer() runs long after the memblock allocator has already been torn down, potentially resulting in a use after free in memblock_isolate_range().

With KASAN or KFENCE, this use after free will result in a BUG from the idle task, and a subsequent kernel panic.

Switch ima_free_kexec_buffer() over to memblock_free_late() to avoid that bug.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-52576"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-02T22:15:49Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/mm, kexec, ima: Use memblock_free_late() from ima_free_kexec_buffer()\n\nThe code calling ima_free_kexec_buffer() runs long after the memblock\nallocator has already been torn down, potentially resulting in a use\nafter free in memblock_isolate_range().\n\nWith KASAN or KFENCE, this use after free will result in a BUG\nfrom the idle task, and a subsequent kernel panic.\n\nSwitch ima_free_kexec_buffer() over to memblock_free_late() to avoid\nthat bug.",
  "id": "GHSA-jj48-3v62-2vf9",
  "modified": "2024-11-01T18:31:25Z",
  "published": "2024-03-03T00:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52576"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/34cf99c250d5cd2530b93a57b0de31d3aaf8685b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d2dfbc0e3b7a04c2d941421a958dc31c897fb204"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eef16bfdb212da60f5144689f2967fb25b051a2b"
    }
  ],
  "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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