Vulnerability-Lookup

FKIE_CVE-2023-54323

Vulnerability from fkie_nvd - Published: 2025-12-30 13:16 - Updated: 2026-06-17 06:47

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: cxl/pmem: Fix nvdimm registration races A loop of the form: while true; do modprobe cxl_pci; modprobe -r cxl_pci; done ...fails with the following crash signature: BUG: kernel NULL pointer dereference, address: 0000000000000040 [..] RIP: 0010:cxl_internal_send_cmd+0x5/0xb0 [cxl_core] [..] Call Trace: <TASK> cxl_pmem_ctl+0x121/0x240 [cxl_pmem] nvdimm_get_config_data+0xd6/0x1a0 [libnvdimm] nd_label_data_init+0x135/0x7e0 [libnvdimm] nvdimm_probe+0xd6/0x1c0 [libnvdimm] nvdimm_bus_probe+0x7a/0x1e0 [libnvdimm] really_probe+0xde/0x380 __driver_probe_device+0x78/0x170 driver_probe_device+0x1f/0x90 __device_attach_driver+0x85/0x110 bus_for_each_drv+0x7d/0xc0 __device_attach+0xb4/0x1e0 bus_probe_device+0x9f/0xc0 device_add+0x445/0x9c0 nd_async_device_register+0xe/0x40 [libnvdimm] async_run_entry_fn+0x30/0x130 ...namely that the bottom half of async nvdimm device registration runs after the CXL has already torn down the context that cxl_pmem_ctl() needs. Unlike the ACPI NFIT case that benefits from launching multiple nvdimm device registrations in parallel from those listed in the table, CXL is already marked PROBE_PREFER_ASYNCHRONOUS. So provide for a synchronous registration path to preclude this scenario.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/18c65667fa9104780eeaa0dc1bc240f0c2094772
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a371788d4f4a7f59eecd22644331d599979fd283
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f57aec443c24d2e8e1f3b5b4856aea12ddda4254

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/pmem.c",
            "drivers/nvdimm/bus.c",
            "drivers/nvdimm/dimm_devs.c",
            "drivers/nvdimm/nd-core.h",
            "include/linux/libnvdimm.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a371788d4f4a7f59eecd22644331d599979fd283",
              "status": "affected",
              "version": "21083f51521fb0f60dbac591f175c3ed48435af4",
              "versionType": "git"
            },
            {
              "lessThan": "18c65667fa9104780eeaa0dc1bc240f0c2094772",
              "status": "affected",
              "version": "21083f51521fb0f60dbac591f175c3ed48435af4",
              "versionType": "git"
            },
            {
              "lessThan": "f57aec443c24d2e8e1f3b5b4856aea12ddda4254",
              "status": "affected",
              "version": "21083f51521fb0f60dbac591f175c3ed48435af4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/pmem.c",
            "drivers/nvdimm/bus.c",
            "drivers/nvdimm/dimm_devs.c",
            "drivers/nvdimm/nd-core.h",
            "include/linux/libnvdimm.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/pmem: Fix nvdimm registration races\n\nA loop of the form:\n\n    while true; do modprobe cxl_pci; modprobe -r cxl_pci; done\n\n...fails with the following crash signature:\n\n    BUG: kernel NULL pointer dereference, address: 0000000000000040\n    [..]\n    RIP: 0010:cxl_internal_send_cmd+0x5/0xb0 [cxl_core]\n    [..]\n    Call Trace:\n     \u003cTASK\u003e\n     cxl_pmem_ctl+0x121/0x240 [cxl_pmem]\n     nvdimm_get_config_data+0xd6/0x1a0 [libnvdimm]\n     nd_label_data_init+0x135/0x7e0 [libnvdimm]\n     nvdimm_probe+0xd6/0x1c0 [libnvdimm]\n     nvdimm_bus_probe+0x7a/0x1e0 [libnvdimm]\n     really_probe+0xde/0x380\n     __driver_probe_device+0x78/0x170\n     driver_probe_device+0x1f/0x90\n     __device_attach_driver+0x85/0x110\n     bus_for_each_drv+0x7d/0xc0\n     __device_attach+0xb4/0x1e0\n     bus_probe_device+0x9f/0xc0\n     device_add+0x445/0x9c0\n     nd_async_device_register+0xe/0x40 [libnvdimm]\n     async_run_entry_fn+0x30/0x130\n\n...namely that the bottom half of async nvdimm device registration runs\nafter the CXL has already torn down the context that cxl_pmem_ctl()\nneeds. Unlike the ACPI NFIT case that benefits from launching multiple\nnvdimm device registrations in parallel from those listed in the table,\nCXL is already marked PROBE_PREFER_ASYNCHRONOUS. So provide for a\nsynchronous registration path to preclude this scenario."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncxl/pmem: Soluciona las condiciones de carrera en el registro de nvdimm\n\nUn bucle de la forma:\n\n    while true; do modprobe cxl_pci; modprobe -r cxl_pci; done\n\n...falla con la siguiente firma de fallo:\n\n    BUG: kernel NULL pointer dereference, address: 0000000000000040\n    [..]\n    RIP: 0010:cxl_internal_send_cmd+0x5/0xb0 [cxl_core]\n    [..]\n    Call Trace:\n     \n     cxl_pmem_ctl+0x121/0x240 [cxl_pmem]\n     nvdimm_get_config_data+0xd6/0x1a0 [libnvdimm]\n     nd_label_data_init+0x135/0x7e0 [libnvdimm]\n     nvdimm_probe+0xd6/0x1c0 [libnvdimm]\n     nvdimm_bus_probe+0x7a/0x1e0 [libnvdimm]\n     really_probe+0xde/0x380\n     __driver_probe_device+0x78/0x170\n     driver_probe_device+0x1f/0x90\n     __device_attach_driver+0x85/0x110\n     bus_for_each_drv+0x7d/0xc0\n     __device_attach+0xb4/0x1e0\n     bus_probe_device+0x9f/0xc0\n     device_add+0x445/0x9c0\n     nd_async_device_register+0xe/0x40 [libnvdimm]\n     async_run_entry_fn+0x30/0x130\n\n...es decir, que la mitad inferior del registro as\u00edncrono de dispositivos nvdimm se ejecuta despu\u00e9s de que el CXL ya ha desmantelado el contexto que cxl_pmem_ctl() necesita. A diferencia del caso ACPI NFIT que se beneficia de lanzar m\u00faltiples registros de dispositivos nvdimm en paralelo de los listados en la tabla, CXL ya est\u00e1 marcado como PROBE_PREFER_ASYNCHRONOUS. As\u00ed que se proporciona una ruta de registro s\u00edncrono para evitar este escenario."
    }
  ],
  "id": "CVE-2023-54323",
  "lastModified": "2026-06-17T06:47:13.623",
  "metrics": {},
  "published": "2025-12-30T13:16:21.627",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/18c65667fa9104780eeaa0dc1bc240f0c2094772"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a371788d4f4a7f59eecd22644331d599979fd283"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f57aec443c24d2e8e1f3b5b4856aea12ddda4254"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}

CVE-2023-54323 (GCVE-0-2023-54323)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:37 – Updated: 2026-05-11 19:59

Title

cxl/pmem: Fix nvdimm registration races

Summary

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6820 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/a371788d4f4a7f59e…
https://git.kernel.org/stable/c/18c65667fa9104780…
https://git.kernel.org/stable/c/f57aec443c24d2e8e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 21083f51521fb0f60dbac591f175c3ed48435af4 , < a371788d4f4a7f59eecd22644331d599979fd283 (git) Affected: 21083f51521fb0f60dbac591f175c3ed48435af4 , < 18c65667fa9104780eeaa0dc1bc240f0c2094772 (git) Affected: 21083f51521fb0f60dbac591f175c3ed48435af4 , < f57aec443c24d2e8e1f3b5b4856aea12ddda4254 (git)
Linux	Linux	Affected: 5.14 Unaffected: 0 , < 5.14 (semver) Unaffected: 6.1.16 , ≤ 6.1.* (semver) Unaffected: 6.2.3 , ≤ 6.2.* (semver) Unaffected: 6.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/pmem.c",
            "drivers/nvdimm/bus.c",
            "drivers/nvdimm/dimm_devs.c",
            "drivers/nvdimm/nd-core.h",
            "include/linux/libnvdimm.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a371788d4f4a7f59eecd22644331d599979fd283",
              "status": "affected",
              "version": "21083f51521fb0f60dbac591f175c3ed48435af4",
              "versionType": "git"
            },
            {
              "lessThan": "18c65667fa9104780eeaa0dc1bc240f0c2094772",
              "status": "affected",
              "version": "21083f51521fb0f60dbac591f175c3ed48435af4",
              "versionType": "git"
            },
            {
              "lessThan": "f57aec443c24d2e8e1f3b5b4856aea12ddda4254",
              "status": "affected",
              "version": "21083f51521fb0f60dbac591f175c3ed48435af4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/pmem.c",
            "drivers/nvdimm/bus.c",
            "drivers/nvdimm/dimm_devs.c",
            "drivers/nvdimm/nd-core.h",
            "include/linux/libnvdimm.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.16",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.3",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/pmem: Fix nvdimm registration races\n\nA loop of the form:\n\n    while true; do modprobe cxl_pci; modprobe -r cxl_pci; done\n\n...fails with the following crash signature:\n\n    BUG: kernel NULL pointer dereference, address: 0000000000000040\n    [..]\n    RIP: 0010:cxl_internal_send_cmd+0x5/0xb0 [cxl_core]\n    [..]\n    Call Trace:\n     \u003cTASK\u003e\n     cxl_pmem_ctl+0x121/0x240 [cxl_pmem]\n     nvdimm_get_config_data+0xd6/0x1a0 [libnvdimm]\n     nd_label_data_init+0x135/0x7e0 [libnvdimm]\n     nvdimm_probe+0xd6/0x1c0 [libnvdimm]\n     nvdimm_bus_probe+0x7a/0x1e0 [libnvdimm]\n     really_probe+0xde/0x380\n     __driver_probe_device+0x78/0x170\n     driver_probe_device+0x1f/0x90\n     __device_attach_driver+0x85/0x110\n     bus_for_each_drv+0x7d/0xc0\n     __device_attach+0xb4/0x1e0\n     bus_probe_device+0x9f/0xc0\n     device_add+0x445/0x9c0\n     nd_async_device_register+0xe/0x40 [libnvdimm]\n     async_run_entry_fn+0x30/0x130\n\n...namely that the bottom half of async nvdimm device registration runs\nafter the CXL has already torn down the context that cxl_pmem_ctl()\nneeds. Unlike the ACPI NFIT case that benefits from launching multiple\nnvdimm device registrations in parallel from those listed in the table,\nCXL is already marked PROBE_PREFER_ASYNCHRONOUS. So provide for a\nsynchronous registration path to preclude this scenario."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:59:44.788Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a371788d4f4a7f59eecd22644331d599979fd283"
        },
        {
          "url": "https://git.kernel.org/stable/c/18c65667fa9104780eeaa0dc1bc240f0c2094772"
        },
        {
          "url": "https://git.kernel.org/stable/c/f57aec443c24d2e8e1f3b5b4856aea12ddda4254"
        }
      ],
      "title": "cxl/pmem: Fix nvdimm registration races",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54323",
    "datePublished": "2025-12-30T12:37:07.656Z",
    "dateReserved": "2025-12-30T12:35:56.209Z",
    "dateUpdated": "2026-05-11T19:59:44.788Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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