GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

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

Vulnerability from cvelistv5 – Published: 2025-10-01 11:42 – Updated: 2026-05-11 19:45
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
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e50fe01e1f2a4aba2275edee7d5c77ac87674ddb , < 748fadc08bcbdaf573b34d9784bb3dbd87441dbf (git)
Affected: e50fe01e1f2a4aba2275edee7d5c77ac87674ddb , < 316db489647b8ddc381682597e89787eac61a278 (git)
Affected: e50fe01e1f2a4aba2275edee7d5c77ac87674ddb , < 4cf67d3cc9994a59cf77bb9c0ccf9007fe916afe (git)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/acpi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "748fadc08bcbdaf573b34d9784bb3dbd87441dbf",
              "status": "affected",
              "version": "e50fe01e1f2a4aba2275edee7d5c77ac87674ddb",
              "versionType": "git"
            },
            {
              "lessThan": "316db489647b8ddc381682597e89787eac61a278",
              "status": "affected",
              "version": "e50fe01e1f2a4aba2275edee7d5c77ac87674ddb",
              "versionType": "git"
            },
            {
              "lessThan": "4cf67d3cc9994a59cf77bb9c0ccf9007fe916afe",
              "status": "affected",
              "version": "e50fe01e1f2a4aba2275edee7d5c77ac87674ddb",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/acpi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.43",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.43",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.8",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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": "2026-05-11T19:45:46.984Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/748fadc08bcbdaf573b34d9784bb3dbd87441dbf"
        },
        {
          "url": "https://git.kernel.org/stable/c/316db489647b8ddc381682597e89787eac61a278"
        },
        {
          "url": "https://git.kernel.org/stable/c/4cf67d3cc9994a59cf77bb9c0ccf9007fe916afe"
        }
      ],
      "title": "cxl/acpi: Fix a use-after-free in cxl_parse_cfmws()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53479",
    "datePublished": "2025-10-01T11:42:47.987Z",
    "dateReserved": "2025-10-01T11:39:39.401Z",
    "dateUpdated": "2026-05-11T19:45:46.984Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-53479",
      "date": "2026-09-19",
      "epss": "0.00157",
      "percentile": "0.05336"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/cxl/acpi.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "748fadc08bcbdaf573b34d9784bb3dbd87441dbf",
                    "status": "affected",
                    "version": "e50fe01e1f2a4aba2275edee7d5c77ac87674ddb",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "316db489647b8ddc381682597e89787eac61a278",
                    "status": "affected",
                    "version": "e50fe01e1f2a4aba2275edee7d5c77ac87674ddb",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "4cf67d3cc9994a59cf77bb9c0ccf9007fe916afe",
                    "status": "affected",
                    "version": "e50fe01e1f2a4aba2275edee7d5c77ac87674ddb",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/cxl/acpi.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "6.0"
                  },
                  {
                    "lessThan": "6.0",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.43",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.4.*",
                    "status": "unaffected",
                    "version": "6.4.8",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.5",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "056E5E87-C809-438C-8A36-8E1B4AE0CA48",
                    "versionEndExcluding": "6.1.43",
                    "versionStartIncluding": "6.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "6F5CB671-C757-4B7A-B3D3-283AFE20F0D7",
                    "versionEndExcluding": "6.4.8",
                    "versionStartIncluding": "6.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "0B3E6E4D-E24E-4630-B00C-8C9901C597B0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "E4A01A71-0F09-4DB2-A02F-7EFFBE27C98D",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*",
                    "matchCriteriaId": "F5608371-157A-4318-8A2E-4104C3467EA1",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "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."
          }
        ],
        "id": "CVE-2023-53479",
        "lastModified": "2026-06-17T06:45:26.020",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-10-01T12:15:50.447",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/316db489647b8ddc381682597e89787eac61a278"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4cf67d3cc9994a59cf77bb9c0ccf9007fe916afe"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/748fadc08bcbdaf573b34d9784bb3dbd87441dbf"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-21T18:53:33+00:00",
      "cve": "CVE-2023-53479",
      "id": "CVE-2023-53479",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "279",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "166",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel CXL driver: Use-after-free vulnerability leading to system instability or privilege escalation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53479.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T02:21:01Z",
      "cve": "CVE-2023-53479",
      "id": "CVE-2023-53479",
      "initial_release_date": "2025-10-01T23:30:28Z",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "393",
      "product_status:recommended": "339",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53479",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53479.json",
      "version": "51"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.