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

Vulnerability from cvelistv5 – Published: 2025-12-30 12:37 – Updated: 2026-05-11 19:59
VLAI
Title
cxl/pmem: Fix nvdimm registration races
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 21083f51521fb0f60dbac591f175c3ed48435af4 , < a371788d4f4a7f59eecd22644331d599979fd283 (git)
Affected: 21083f51521fb0f60dbac591f175c3ed48435af4 , < 18c65667fa9104780eeaa0dc1bc240f0c2094772 (git)
Affected: 21083f51521fb0f60dbac591f175c3ed48435af4 , < f57aec443c24d2e8e1f3b5b4856aea12ddda4254 (git)
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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)
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{
  "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",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-54323",
      "date": "2026-09-17",
      "epss": "0.0018",
      "percentile": "0.07764"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-54323\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-30T13:16:21.627\",\"lastModified\":\"2026-06-17T06:47:13.623\",\"vulnStatus\":\"Deferred\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"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\",\"versions\":[{\"version\":\"21083f51521fb0f60dbac591f175c3ed48435af4\",\"lessThan\":\"a371788d4f4a7f59eecd22644331d599979fd283\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"21083f51521fb0f60dbac591f175c3ed48435af4\",\"lessThan\":\"18c65667fa9104780eeaa0dc1bc240f0c2094772\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"21083f51521fb0f60dbac591f175c3ed48435af4\",\"lessThan\":\"f57aec443c24d2e8e1f3b5b4856aea12ddda4254\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"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\",\"versions\":[{\"version\":\"5.14\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.14\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.16\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2.3\",\"lessThanOrEqual\":\"6.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:26:36+00:00",
      "cve": "CVE-2023-54323",
      "id": "CVE-2023-54323",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "280",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "174",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: cxl/pmem: Fix nvdimm registration races",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54323.json",
      "version": "3"
    }
  }
}



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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.

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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.
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  • 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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