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

{
  "id": "e31044ebecf1d483f570f926f462b824cd945de9148800cd4bdfeec2e37b99eb",
  "url": "https://osv.dev/vulnerability/CVE-2023-53479",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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.",
    "evidence": "osv:CVE-2023-53479",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.43",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.4.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2023-53479",
      "aliases": [
        "CVE-2023-53479"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "e50fe01e1f2a4aba2275edee7d5c77ac87674ddb"
                },
                {
                  "fixed": "748fadc08bcbdaf573b34d9784bb3dbd87441dbf"
                },
                {
                  "fixed": "316db489647b8ddc381682597e89787eac61a278"
                },
                {
                  "fixed": "4cf67d3cc9994a59cf77bb9c0ccf9007fe916afe"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53479.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.0.0"
                },
                {
                  "fixed": "6.1.43"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.4.8"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53479.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.285806907Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/316db489647b8ddc381682597e89787eac61a278",
        "https://git.kernel.org/stable/c/4cf67d3cc9994a59cf77bb9c0ccf9007fe916afe",
        "https://git.kernel.org/stable/c/748fadc08bcbdaf573b34d9784bb3dbd87441dbf",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53479.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53479",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53479.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-53479",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 490839,
  "published_at": "2025-10-01T11:42:47.987+00:00"
}