CVE-2023-53479 (GCVE-0-2023-53479)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:42 – Updated: 2025-10-01 11:42
VLAI?
Title
cxl/acpi: Fix a use-after-free in cxl_parse_cfmws()
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e50fe01e1f2a4aba2275edee7d5c77ac87674ddb , < 748fadc08bcbdaf573b34d9784bb3dbd87441dbf (git)
Affected: e50fe01e1f2a4aba2275edee7d5c77ac87674ddb , < 316db489647b8ddc381682597e89787eac61a278 (git)
Affected: e50fe01e1f2a4aba2275edee7d5c77ac87674ddb , < 4cf67d3cc9994a59cf77bb9c0ccf9007fe916afe (git)
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    Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.43 , ≤ 6.1.* (semver)
Unaffected: 6.4.8 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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{
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      "affected": [
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          "product": "Linux",
          "programFiles": [
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-01T11:42:47.987Z",
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        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/316db489647b8ddc381682597e89787eac61a278"
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        {
          "url": "https://git.kernel.org/stable/c/4cf67d3cc9994a59cf77bb9c0ccf9007fe916afe"
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      ],
      "title": "cxl/acpi: Fix a use-after-free in cxl_parse_cfmws()",
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    "cveId": "CVE-2023-53479",
    "datePublished": "2025-10-01T11:42:47.987Z",
    "dateReserved": "2025-10-01T11:39:39.401Z",
    "dateUpdated": "2025-10-01T11:42:47.987Z",
    "state": "PUBLISHED"
  },
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.