Vulnerability-Lookup

GHSA-J48G-PW4C-X8JM

Vulnerability from github – Published: 2026-03-25 12:30 – Updated: 2026-04-24 18:30

Details

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->parent that points to &nvdimm_bus->dev.

[ 192.884510] BUG: kernel NULL pointer dereference, address: 000000000000006c [ 192.895383] Hardware name: QEMU Standard PC (Q35 + 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+0xc/0x90 [ 192.924871] Call Trace: [ 192.925959] [ 192.926976] ? pm_runtime_init+0xb9/0xe0 [ 192.929712] __nd_device_register.part.0+0x4d/0xc0 [libnvdimm] [ 192.933314] __nvdimm_create+0x206/0x290 [libnvdimm] [ 192.936662] cxl_nvdimm_probe+0x119/0x1d0 [cxl_pmem] [ 192.940245] cxl_bus_probe+0x1a/0x60 [cxl_core] [ 192.943349] really_probe+0xde/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.

Set probe_type of cxl_nvb to PROBE_FORCE_SYNCHRONOUS to ensure the driver is probed synchronously when add_device() is called.
Add a check in __devm_cxl_add_nvdimm_bridge() to ensure that the cxl_nvb driver is attached during cxl_acpi_probe().
Take the cxl_root uport_dev lock and the cxl_nvb->dev lock in devm_cxl_add_nvdimm() before checking nvdimm_bus is valid.
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) ]

Severity

4.7 (Medium)


                  
                    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-23348"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-25T11:16:33Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl: Fix race of nvdimm_bus object when creating nvdimm objects\n\nFound issue during running of cxl-translate.sh unit test. Adding a 3s\nsleep right before the test seems to make the issue reproduce fairly\nconsistently. The cxl_translate module has dependency on cxl_acpi and\ncauses orphaned nvdimm objects to reprobe after cxl_acpi is removed.\nThe nvdimm_bus object is registered by the cxl_nvb object when\ncxl_acpi_probe() is called. With the nvdimm_bus object missing,\n__nd_device_register() will trigger NULL pointer dereference when\naccessing the dev-\u003eparent that points to \u0026nvdimm_bus-\u003edev.\n\n[  192.884510] BUG: kernel NULL pointer dereference, address: 000000000000006c\n[  192.895383] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS edk2-20250812-19.fc42 08/12/2025\n[  192.897721] Workqueue: cxl_port cxl_bus_rescan_queue [cxl_core]\n[  192.899459] RIP: 0010:kobject_get+0xc/0x90\n[  192.924871] Call Trace:\n[  192.925959]  \u003cTASK\u003e\n[  192.926976]  ? pm_runtime_init+0xb9/0xe0\n[  192.929712]  __nd_device_register.part.0+0x4d/0xc0 [libnvdimm]\n[  192.933314]  __nvdimm_create+0x206/0x290 [libnvdimm]\n[  192.936662]  cxl_nvdimm_probe+0x119/0x1d0 [cxl_pmem]\n[  192.940245]  cxl_bus_probe+0x1a/0x60 [cxl_core]\n[  192.943349]  really_probe+0xde/0x380\n\nThis patch also relies on the previous change where\ndevm_cxl_add_nvdimm_bridge() is called from drivers/cxl/pmem.c instead\nof drivers/cxl/core.c to ensure the dependency of cxl_acpi on cxl_pmem.\n\n1. Set probe_type of cxl_nvb to PROBE_FORCE_SYNCHRONOUS to ensure the\n   driver is probed synchronously when add_device() is called.\n2. Add a check in __devm_cxl_add_nvdimm_bridge() to ensure that the\n   cxl_nvb driver is attached during cxl_acpi_probe().\n3. Take the cxl_root uport_dev lock and the cxl_nvb-\u003edev lock in\n   devm_cxl_add_nvdimm() before checking nvdimm_bus is valid.\n4. Set cxl_nvdimm flag to CXL_NVD_F_INVALIDATED so cxl_nvdimm_probe()\n   will exit with -EBUSY.\n\nThe removal of cxl_nvdimm devices should prevent any orphaned devices\nfrom probing once the nvdimm_bus is gone.\n\n[ dj: Fixed 0-day reported kdoc issue. ]\n[ dj: Fix cxl_nvb reference leak on error. Gregory (kreview-0811365) ]",
  "id": "GHSA-j48g-pw4c-x8jm",
  "modified": "2026-04-24T18:30:40Z",
  "published": "2026-03-25T12:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23348"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5b230daeee420833287cc77314439903e5312f10"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5fc4e150c5ada5f7d20d8f9f1b351f10481fbdf7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96a1fd0d84b17360840f344826897fa71049870e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-23348 (GCVE-0-2026-23348)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:27 – Updated: 2026-05-11 22:05

Title

cxl: Fix race of nvdimm_bus object when creating nvdimm objects

Summary

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->parent that points to &nvdimm_bus->dev. [ 192.884510] BUG: kernel NULL pointer dereference, address: 000000000000006c [ 192.895383] Hardware name: QEMU Standard PC (Q35 + 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+0xc/0x90 [ 192.924871] Call Trace: [ 192.925959] <TASK> [ 192.926976] ? pm_runtime_init+0xb9/0xe0 [ 192.929712] __nd_device_register.part.0+0x4d/0xc0 [libnvdimm] [ 192.933314] __nvdimm_create+0x206/0x290 [libnvdimm] [ 192.936662] cxl_nvdimm_probe+0x119/0x1d0 [cxl_pmem] [ 192.940245] cxl_bus_probe+0x1a/0x60 [cxl_core] [ 192.943349] really_probe+0xde/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->dev 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) ]

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/5fc4e150c5ada5f7d…
https://git.kernel.org/stable/c/5b230daeee4208332…
https://git.kernel.org/stable/c/96a1fd0d84b173608…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8fdcb1704f61a8fd9be0f3849a174d084def0666 , < 5fc4e150c5ada5f7d20d8f9f1b351f10481fbdf7 (git) Affected: 8fdcb1704f61a8fd9be0f3849a174d084def0666 , < 5b230daeee420833287cc77314439903e5312f10 (git) Affected: 8fdcb1704f61a8fd9be0f3849a174d084def0666 , < 96a1fd0d84b17360840f344826897fa71049870e (git)
Linux	Linux	Affected: 5.14 Unaffected: 0 , < 5.14 (semver) Unaffected: 6.18.17 , ≤ 6.18.* (semver) Unaffected: 6.19.7 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/core/pmem.c",
            "drivers/cxl/cxl.h",
            "drivers/cxl/pmem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5fc4e150c5ada5f7d20d8f9f1b351f10481fbdf7",
              "status": "affected",
              "version": "8fdcb1704f61a8fd9be0f3849a174d084def0666",
              "versionType": "git"
            },
            {
              "lessThan": "5b230daeee420833287cc77314439903e5312f10",
              "status": "affected",
              "version": "8fdcb1704f61a8fd9be0f3849a174d084def0666",
              "versionType": "git"
            },
            {
              "lessThan": "96a1fd0d84b17360840f344826897fa71049870e",
              "status": "affected",
              "version": "8fdcb1704f61a8fd9be0f3849a174d084def0666",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/core/pmem.c",
            "drivers/cxl/cxl.h",
            "drivers/cxl/pmem.c"
          ],
          "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": "6.18.*",
              "status": "unaffected",
              "version": "6.18.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.17",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.7",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "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: Fix race of nvdimm_bus object when creating nvdimm objects\n\nFound issue during running of cxl-translate.sh unit test. Adding a 3s\nsleep right before the test seems to make the issue reproduce fairly\nconsistently. The cxl_translate module has dependency on cxl_acpi and\ncauses orphaned nvdimm objects to reprobe after cxl_acpi is removed.\nThe nvdimm_bus object is registered by the cxl_nvb object when\ncxl_acpi_probe() is called. With the nvdimm_bus object missing,\n__nd_device_register() will trigger NULL pointer dereference when\naccessing the dev-\u003eparent that points to \u0026nvdimm_bus-\u003edev.\n\n[  192.884510] BUG: kernel NULL pointer dereference, address: 000000000000006c\n[  192.895383] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS edk2-20250812-19.fc42 08/12/2025\n[  192.897721] Workqueue: cxl_port cxl_bus_rescan_queue [cxl_core]\n[  192.899459] RIP: 0010:kobject_get+0xc/0x90\n[  192.924871] Call Trace:\n[  192.925959]  \u003cTASK\u003e\n[  192.926976]  ? pm_runtime_init+0xb9/0xe0\n[  192.929712]  __nd_device_register.part.0+0x4d/0xc0 [libnvdimm]\n[  192.933314]  __nvdimm_create+0x206/0x290 [libnvdimm]\n[  192.936662]  cxl_nvdimm_probe+0x119/0x1d0 [cxl_pmem]\n[  192.940245]  cxl_bus_probe+0x1a/0x60 [cxl_core]\n[  192.943349]  really_probe+0xde/0x380\n\nThis patch also relies on the previous change where\ndevm_cxl_add_nvdimm_bridge() is called from drivers/cxl/pmem.c instead\nof drivers/cxl/core.c to ensure the dependency of cxl_acpi on cxl_pmem.\n\n1. Set probe_type of cxl_nvb to PROBE_FORCE_SYNCHRONOUS to ensure the\n   driver is probed synchronously when add_device() is called.\n2. Add a check in __devm_cxl_add_nvdimm_bridge() to ensure that the\n   cxl_nvb driver is attached during cxl_acpi_probe().\n3. Take the cxl_root uport_dev lock and the cxl_nvb-\u003edev lock in\n   devm_cxl_add_nvdimm() before checking nvdimm_bus is valid.\n4. Set cxl_nvdimm flag to CXL_NVD_F_INVALIDATED so cxl_nvdimm_probe()\n   will exit with -EBUSY.\n\nThe removal of cxl_nvdimm devices should prevent any orphaned devices\nfrom probing once the nvdimm_bus is gone.\n\n[ dj: Fixed 0-day reported kdoc issue. ]\n[ dj: Fix cxl_nvb reference leak on error. Gregory (kreview-0811365) ]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:05:07.592Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5fc4e150c5ada5f7d20d8f9f1b351f10481fbdf7"
        },
        {
          "url": "https://git.kernel.org/stable/c/5b230daeee420833287cc77314439903e5312f10"
        },
        {
          "url": "https://git.kernel.org/stable/c/96a1fd0d84b17360840f344826897fa71049870e"
        }
      ],
      "title": "cxl: Fix race of nvdimm_bus object when creating nvdimm objects",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23348",
    "datePublished": "2026-03-25T10:27:34.462Z",
    "dateReserved": "2026-01-13T15:37:45.999Z",
    "dateUpdated": "2026-05-11T22:05:07.592Z",
    "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.

Detection rules are retrieved from Rulezet.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.