ghsa-mfgv-xhqx-f8x7
Vulnerability from github
Published
2025-10-01 12:30
Modified
2025-10-01 12:30
Details

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

cxl/acpi: Fix a use-after-free in cxl_parse_cfmws()

KASAN and KFENCE detected an user-after-free in the CXL driver. This happens in the cxl_decoder_add() fail path. KASAN prints the following error:

BUG: KASAN: slab-use-after-free in cxl_parse_cfmws (drivers/cxl/acpi.c:299)

This happens in cxl_parse_cfmws(), where put_device() is called, releasing cxld, which is accessed later.

Use the local variables in the dev_err() instead of pointing to the released memory. Since the dev_err() is printing a resource, change the open coded print format to use the %pr format specifier.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53479"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-01T12:15:50Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/acpi: Fix a use-after-free in cxl_parse_cfmws()\n\nKASAN and KFENCE detected an user-after-free in the CXL driver. This\nhappens in the cxl_decoder_add() fail path. KASAN prints the following\nerror:\n\n   BUG: KASAN: slab-use-after-free in cxl_parse_cfmws (drivers/cxl/acpi.c:299)\n\nThis happens in cxl_parse_cfmws(), where put_device() is called,\nreleasing cxld, which is accessed later.\n\nUse the local variables in the dev_err() instead of pointing to the\nreleased memory. Since the dev_err() is printing a resource, change the open\ncoded print format to use the %pr format specifier.",
  "id": "GHSA-mfgv-xhqx-f8x7",
  "modified": "2025-10-01T12:30:30Z",
  "published": "2025-10-01T12:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53479"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/316db489647b8ddc381682597e89787eac61a278"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4cf67d3cc9994a59cf77bb9c0ccf9007fe916afe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/748fadc08bcbdaf573b34d9784bb3dbd87441dbf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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