{
  "cveId": "CVE-2026-23348",
  "url": "https://patchblox.com/security/cve/CVE-2026-23348",
  "summary": "CVE-2026-23348 is fixed in 14 products on 1 platform, first by DEBIAN-CVE-2026-23348, released March 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "cxl: Fix race of nvdimm_bus object when creating nvdimm objects",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  cxl: Fix race of nvdimm_bus object when creating nvdimm objects  Found issue during running of cxl-translate.sh unit test. Adding a 3s sleep right before the test seems to make the issue reproduce fairly consistently. The cxl_translate module has dependency on cxl_acpi and causes orphaned nvdimm objects to reprobe after cxl_acpi is removed. The nvdimm_bus object is registered by the cxl_nvb object when cxl_acpi_probe() is called. With the nvdimm_bus object missing, __nd_device_register() will trigger NULL pointer dereference when accessing the dev-\u003Eparent that points to \u0026nvdimm_bus-\u003Edev.  [  192.884510] BUG: kernel NULL pointer dereference, address: 000000000000006c [  192.895383] Hardware name: QEMU Standard PC (Q35 \u002B ICH9, 2009), BIOS edk2-20250812-19.fc42 08/12/2025 [  192.897721] Workqueue: cxl_port cxl_bus_rescan_queue [cxl_core] [  192.899459] RIP: 0010:kobject_get\u002B0xc/0x90 [  192.924871] Call Trace: [  192.925959]  \u003CTASK\u003E [  192.926976]  ? pm_runtime_init\u002B0xb9/0xe0 [  192.929712]  __nd_device_register.part.0\u002B0x4d/0xc0 [libnvdimm] [  192.933314]  __nvdimm_create\u002B0x206/0x290 [libnvdimm] [  192.936662]  cxl_nvdimm_probe\u002B0x119/0x1d0 [cxl_pmem] [  192.940245]  cxl_bus_probe\u002B0x1a/0x60 [cxl_core] [  192.943349]  really_probe\u002B0xde/0x380  This patch also relies on the previous change where devm_cxl_add_nvdimm_bridge() is called from drivers/cxl/pmem.c instead of drivers/cxl/core.c to ensure the dependency of cxl_acpi on cxl_pmem.  1. Set probe_type of cxl_nvb to PROBE_FORCE_SYNCHRONOUS to ensure the    driver is probed synchronously when add_device() is called. 2. Add a check in __devm_cxl_add_nvdimm_bridge() to ensure that the    cxl_nvb driver is attached during cxl_acpi_probe(). 3. Take the cxl_root uport_dev lock and the cxl_nvb-\u003Edev lock in    devm_cxl_add_nvdimm() before checking nvdimm_bus is valid. 4. Set cxl_nvdimm flag to CXL_NVD_F_INVALIDATED so cxl_nvdimm_probe()    will exit with -EBUSY.  The removal of cxl_nvdimm devices should prevent any orphaned devices from probing once the nvdimm_bus is gone.  [ dj: Fixed 0-day reported kdoc issue. ] [ dj: Fix cxl_nvb reference leak on error. Gregory (kreview-0811365) ]",
  "published": "2026-03-25T11:16:33Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00091,
  "epssPercentile": 0.00473,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23348",
  "fixes": [
    {
      "platform": "linux",
      "product": "dtb-aarch64",
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      "fixedVersion": "6.12.0-160000.38.1",
      "fix": "OPENSUSE-SU-2026:21910-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21910-1",
      "released": "2026-09-22T15:26:20Z"
    },
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      "fix": "OPENSUSE-SU-2026:21910-1",
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      "released": "2026-09-22T15:26:20Z"
    },
    {
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      "fix": "SUSE-SU-2026:23902-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-23902-1",
      "released": "2026-09-22T14:23:31Z"
    },
    {
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      "released": "2026-09-22T15:26:20Z"
    },
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      "released": "2026-09-22T14:23:31Z"
    },
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      "released": "2026-09-22T14:23:31Z"
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    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}