Vulnerability-Lookup

FKIE_CVE-2026-93202

Vulnerability from fkie_nvd - Published: 2026-09-17 17:18 - Updated: 2026-09-17 17:18

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: i3c: master: Fix recursive locking during device registration i3c_master_register_new_i3c_devs() registers newly discovered devices while holding i3c_bus_normaluse_lock(), a down_read(). device_register() can immediately probe the device, and probe callbacks typically invoke I3C helpers that take i3c_bus_normaluse_lock() again, leading to a recursive acquisition of the same rwsem. rwsems do not support recursive read locking and can deadlock when a writer is waiting. See the "Recursive read locks" section of Documentation/locking/lockdep-design.rst. For example, with Intel LPSS I3C, LOCKDEP generates a WARNING like: # echo intel-lpss-i3c.0 > /sys/bus/platform/drivers/mipi-i3c-hci/unbind # echo intel-lpss-i3c.0 > /sys/bus/platform/drivers/mipi-i3c-hci/bind WARNING: possible recursive locking detected kworker/5:1/94 is trying to acquire lock: ffff88811c810d78 (&i3cbus->lock){++++}-{4:4}, at: i3c_device_match_id+0x45/0x370 but task is already holding lock: ffff88811c810d78 (&i3cbus->lock){++++}-{4:4}, at: i3c_master_reg_work_fn+0x21/0x5f0 Fix this by separating device creation from device registration. Populate desc->dev under the maintenance lock, collect the devices that still need registration into a local list, then release the lock before calling device_register(). Finally retake the lock and clean up any devices that failed to register. Use the maintenance lock rather than the normal-use lock while adding device objects. A write-side maintenance lock prevents readers from observing a partially initialized desc->dev during initial device population, or desc->dev disappearing if registration fails. The local list requires a list node, so add a list node member to struct i3c_device.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/456f832e5fc26fbfd3b8200fd4553eee520cc377
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/i3c/master.c",
            "include/linux/i3c/master.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b",
              "status": "affected",
              "version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
              "versionType": "git"
            },
            {
              "lessThan": "9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c",
              "status": "affected",
              "version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
              "versionType": "git"
            },
            {
              "lessThan": "456f832e5fc26fbfd3b8200fd4553eee520cc377",
              "status": "affected",
              "version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/i3c/master.c",
            "include/linux/i3c/master.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.0"
            },
            {
              "lessThan": "5.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "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\ni3c: master: Fix recursive locking during device registration\n\ni3c_master_register_new_i3c_devs() registers newly discovered devices\nwhile holding i3c_bus_normaluse_lock(), a down_read().  device_register()\ncan immediately probe the device, and probe callbacks typically invoke\nI3C helpers that take i3c_bus_normaluse_lock() again, leading to a\nrecursive acquisition of the same rwsem.  rwsems do not support recursive\nread locking and can deadlock when a writer is waiting.  See the\n\"Recursive read locks\" section of Documentation/locking/lockdep-design.rst.\n\nFor example, with Intel LPSS I3C, LOCKDEP generates a WARNING like:\n  # echo intel-lpss-i3c.0 \u003e /sys/bus/platform/drivers/mipi-i3c-hci/unbind\n  # echo intel-lpss-i3c.0 \u003e /sys/bus/platform/drivers/mipi-i3c-hci/bind\n  WARNING: possible recursive locking detected\n  kworker/5:1/94 is trying to acquire lock:\n  ffff88811c810d78 (\u0026i3cbus-\u003elock){++++}-{4:4}, at: i3c_device_match_id+0x45/0x370\n  but task is already holding lock:\n  ffff88811c810d78 (\u0026i3cbus-\u003elock){++++}-{4:4}, at: i3c_master_reg_work_fn+0x21/0x5f0\n\nFix this by separating device creation from device registration.\nPopulate desc-\u003edev under the maintenance lock, collect the devices that\nstill need registration into a local list, then release the lock before\ncalling device_register().  Finally retake the lock and clean up any\ndevices that failed to register.\n\nUse the maintenance lock rather than the normal-use lock while adding\ndevice objects.  A write-side maintenance lock prevents readers from\nobserving a partially initialized desc-\u003edev during initial device\npopulation, or desc-\u003edev disappearing if registration fails.\n\nThe local list requires a list node, so add a list node member to struct\ni3c_device."
    }
  ],
  "id": "CVE-2026-93202",
  "lastModified": "2026-09-17T17:18:16.510",
  "metrics": {},
  "published": "2026-09-17T17:18:16.510",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/456f832e5fc26fbfd3b8200fd4553eee520cc377"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-93202 (GCVE-0-2026-93202)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:12 – Updated: 2026-09-17 16:12

Title

i3c: master: Fix recursive locking during device registration

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/b25232f66e8cd653d…
https://git.kernel.org/stable/c/9dc73c51ed3ee965c…
https://git.kernel.org/stable/c/456f832e5fc26fbfd…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 , < b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b (git) Affected: 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 , < 9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c (git) Affected: 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 , < 456f832e5fc26fbfd3b8200fd4553eee520cc377 (git)
Linux	Linux	Affected: 5.0 Unaffected: 0 , < 5.0 (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/i3c/master.c",
            "include/linux/i3c/master.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b",
              "status": "affected",
              "version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
              "versionType": "git"
            },
            {
              "lessThan": "9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c",
              "status": "affected",
              "version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
              "versionType": "git"
            },
            {
              "lessThan": "456f832e5fc26fbfd3b8200fd4553eee520cc377",
              "status": "affected",
              "version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/i3c/master.c",
            "include/linux/i3c/master.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.0"
            },
            {
              "lessThan": "5.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: master: Fix recursive locking during device registration\n\ni3c_master_register_new_i3c_devs() registers newly discovered devices\nwhile holding i3c_bus_normaluse_lock(), a down_read().  device_register()\ncan immediately probe the device, and probe callbacks typically invoke\nI3C helpers that take i3c_bus_normaluse_lock() again, leading to a\nrecursive acquisition of the same rwsem.  rwsems do not support recursive\nread locking and can deadlock when a writer is waiting.  See the\n\"Recursive read locks\" section of Documentation/locking/lockdep-design.rst.\n\nFor example, with Intel LPSS I3C, LOCKDEP generates a WARNING like:\n  # echo intel-lpss-i3c.0 \u003e /sys/bus/platform/drivers/mipi-i3c-hci/unbind\n  # echo intel-lpss-i3c.0 \u003e /sys/bus/platform/drivers/mipi-i3c-hci/bind\n  WARNING: possible recursive locking detected\n  kworker/5:1/94 is trying to acquire lock:\n  ffff88811c810d78 (\u0026i3cbus-\u003elock){++++}-{4:4}, at: i3c_device_match_id+0x45/0x370\n  but task is already holding lock:\n  ffff88811c810d78 (\u0026i3cbus-\u003elock){++++}-{4:4}, at: i3c_master_reg_work_fn+0x21/0x5f0\n\nFix this by separating device creation from device registration.\nPopulate desc-\u003edev under the maintenance lock, collect the devices that\nstill need registration into a local list, then release the lock before\ncalling device_register().  Finally retake the lock and clean up any\ndevices that failed to register.\n\nUse the maintenance lock rather than the normal-use lock while adding\ndevice objects.  A write-side maintenance lock prevents readers from\nobserving a partially initialized desc-\u003edev during initial device\npopulation, or desc-\u003edev disappearing if registration fails.\n\nThe local list requires a list node, so add a list node member to struct\ni3c_device."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:12:23.071Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b"
        },
        {
          "url": "https://git.kernel.org/stable/c/9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c"
        },
        {
          "url": "https://git.kernel.org/stable/c/456f832e5fc26fbfd3b8200fd4553eee520cc377"
        }
      ],
      "title": "i3c: master: Fix recursive locking during device registration",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93202",
    "datePublished": "2026-09-17T16:12:23.071Z",
    "dateReserved": "2026-09-17T16:02:15.092Z",
    "dateUpdated": "2026-09-17T16:12:23.071Z",
    "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.
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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.

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.
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