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GHSA-3X44-VFGM-9V7X

Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

dpll: fix NULL deref in dpll_device_ops() during teardown race

When the last owner of a dpll device unregisters while a foreign driver still holds a pin on it via dpll_pin_on_pin_register(), the dpll object stays alive with an empty registration list. A pin notification queued before the unregister (e.g. ice reacting to zl3073x_i2c removal) then walks pin->dpll_refs into dpll_device_ops(), which trips the WARN_ON and dereferences the missing registration. dpll_lock cannot help because the notification work was queued before the unregistering driver took the lock.

Treat the empty registration list as a legitimate transient state. Make dpll_priv() and dpll_device_ops() return NULL in that case and make every pin netlink path that resolves a device from a pin skip such dplls. dpll_cmd_pin_get_one() picks a ref with a live registration and returns -ENODEV when there is none, the pin dumpit skips such a pin instead of aborting the dump, dpll_msg_add_pin_dplls() and the frequency, esync, reference sync and phase adjust set paths skip dead refs, and dpll_pin_parent_device_set() validates the parent with dpll_device_get_by_id(). dpll_pin_register() is the last caller that dereferenced the device ops without a check, so move its frequency monitor validation under dpll_lock and tolerate a missing registration there as well.

The empty registration list is equivalent to a cleared DPLL_REGISTERED mark, both transitions happen under dpll_lock in dpll_device_register() and dpll_device_unregister(). A pin notification for a pin whose dplls are all gone is now dropped with -ENODEV instead of crashing, all callers in the core ignore that return value.

WARNING: drivers/dpll/dpll_core.c:1092 at dpll_device_ops+0x24/0x40, CPU#83: kworker/u576:3/23471 Modules linked in: ... ice ... zl3073x_i2c(-) ... zl3073x ... Workqueue: ice_dpll_wq ice_dpll_pin_notify_work [ice] RIP: 0010:dpll_device_ops+0x24/0x40 Call Trace: dpll_cmd_pin_get_one+0x336/0x520 dpll_pin_event_send+0x82/0x140 dpll_pin_on_pin_unregister+0xbb/0x160 ice_dpll_pin_notify_work+0x1bc/0x1f0 [ice] process_one_work+0x19e/0x370 worker_thread+0x1a6/0x310 kthread+0xe4/0x120 ret_from_fork+0x1a1/0x270 ret_from_fork_asm+0x1a/0x30 ---[ end trace 0000000000000000 ]--- BUG: kernel NULL pointer dereference, address: 0000000000000010 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90144"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:07Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndpll: fix NULL deref in dpll_device_ops() during teardown race\n\nWhen the last owner of a dpll device unregisters while a foreign driver\nstill holds a pin on it via dpll_pin_on_pin_register(), the dpll object\nstays alive with an empty registration list. A pin notification queued\nbefore the unregister (e.g. ice reacting to zl3073x_i2c removal) then\nwalks pin-\u003edpll_refs into dpll_device_ops(), which trips the WARN_ON and\ndereferences the missing registration. dpll_lock cannot help because the\nnotification work was queued before the unregistering driver took the\nlock.\n\nTreat the empty registration list as a legitimate transient state. Make\ndpll_priv() and dpll_device_ops() return NULL in that case and make\nevery pin netlink path that resolves a device from a pin skip such\ndplls. dpll_cmd_pin_get_one() picks a ref with a live registration and\nreturns -ENODEV when there is none, the pin dumpit skips such a pin\ninstead of aborting the dump, dpll_msg_add_pin_dplls() and the\nfrequency, esync, reference sync and phase adjust set paths skip dead\nrefs, and dpll_pin_parent_device_set() validates the parent with\ndpll_device_get_by_id(). dpll_pin_register() is the last caller that\ndereferenced the device ops without a check, so move its frequency\nmonitor validation under dpll_lock and tolerate a missing registration\nthere as well.\n\nThe empty registration list is equivalent to a cleared DPLL_REGISTERED\nmark, both transitions happen under dpll_lock in dpll_device_register()\nand dpll_device_unregister(). A pin notification for a pin whose dplls\nare all gone is now dropped with -ENODEV instead of crashing, all\ncallers in the core ignore that return value.\n\n WARNING: drivers/dpll/dpll_core.c:1092 at dpll_device_ops+0x24/0x40,\n CPU#83: kworker/u576:3/23471\n Modules linked in: ... ice ... zl3073x_i2c(-) ... zl3073x ...\n Workqueue: ice_dpll_wq ice_dpll_pin_notify_work [ice]\n RIP: 0010:dpll_device_ops+0x24/0x40\n Call Trace:\n  \u003cTASK\u003e\n  dpll_cmd_pin_get_one+0x336/0x520\n  dpll_pin_event_send+0x82/0x140\n  dpll_pin_on_pin_unregister+0xbb/0x160\n  ice_dpll_pin_notify_work+0x1bc/0x1f0 [ice]\n  process_one_work+0x19e/0x370\n  worker_thread+0x1a6/0x310\n  kthread+0xe4/0x120\n  ret_from_fork+0x1a1/0x270\n  ret_from_fork_asm+0x1a/0x30\n  \u003c/TASK\u003e\n ---[ end trace 0000000000000000 ]---\n BUG: kernel NULL pointer dereference, address: 0000000000000010\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page",
  "id": "GHSA-3x44-vfgm-9v7x",
  "modified": "2026-09-17T18:31:52Z",
  "published": "2026-09-17T18:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90144"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/33f016b23a219fe034213849b51436b8e79df251"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fdbf04e3e01a872d0ef2149f846f1a3e3cb54f5b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-90144 (GCVE-0-2026-90144)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:06 – Updated: 2026-09-17 16:06

Title

dpll: fix NULL deref in dpll_device_ops() during teardown race

Summary

In the Linux kernel, the following vulnerability has been resolved: dpll: fix NULL deref in dpll_device_ops() during teardown race When the last owner of a dpll device unregisters while a foreign driver still holds a pin on it via dpll_pin_on_pin_register(), the dpll object stays alive with an empty registration list. A pin notification queued before the unregister (e.g. ice reacting to zl3073x_i2c removal) then walks pin->dpll_refs into dpll_device_ops(), which trips the WARN_ON and dereferences the missing registration. dpll_lock cannot help because the notification work was queued before the unregistering driver took the lock. Treat the empty registration list as a legitimate transient state. Make dpll_priv() and dpll_device_ops() return NULL in that case and make every pin netlink path that resolves a device from a pin skip such dplls. dpll_cmd_pin_get_one() picks a ref with a live registration and returns -ENODEV when there is none, the pin dumpit skips such a pin instead of aborting the dump, dpll_msg_add_pin_dplls() and the frequency, esync, reference sync and phase adjust set paths skip dead refs, and dpll_pin_parent_device_set() validates the parent with dpll_device_get_by_id(). dpll_pin_register() is the last caller that dereferenced the device ops without a check, so move its frequency monitor validation under dpll_lock and tolerate a missing registration there as well. The empty registration list is equivalent to a cleared DPLL_REGISTERED mark, both transitions happen under dpll_lock in dpll_device_register() and dpll_device_unregister(). A pin notification for a pin whose dplls are all gone is now dropped with -ENODEV instead of crashing, all callers in the core ignore that return value. WARNING: drivers/dpll/dpll_core.c:1092 at dpll_device_ops+0x24/0x40, CPU#83: kworker/u576:3/23471 Modules linked in: ... ice ... zl3073x_i2c(-) ... zl3073x ... Workqueue: ice_dpll_wq ice_dpll_pin_notify_work [ice] RIP: 0010:dpll_device_ops+0x24/0x40 Call Trace: <TASK> dpll_cmd_pin_get_one+0x336/0x520 dpll_pin_event_send+0x82/0x140 dpll_pin_on_pin_unregister+0xbb/0x160 ice_dpll_pin_notify_work+0x1bc/0x1f0 [ice] process_one_work+0x19e/0x370 worker_thread+0x1a6/0x310 kthread+0xe4/0x120 ret_from_fork+0x1a1/0x270 ret_from_fork_asm+0x1a/0x30 </TASK> ---[ end trace 0000000000000000 ]--- BUG: kernel NULL pointer dereference, address: 0000000000000010 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/fdbf04e3e01a872d0…
https://git.kernel.org/stable/c/33f016b23a219fe03…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9431063ad323ac864750aeba4d304389bc42ca4e , < fdbf04e3e01a872d0ef2149f846f1a3e3cb54f5b (git) Affected: 9431063ad323ac864750aeba4d304389bc42ca4e , < 33f016b23a219fe034213849b51436b8e79df251 (git)
Linux	Linux	Affected: 6.7 Unaffected: 0 , < 6.7 (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/dpll/dpll_core.c",
            "drivers/dpll/dpll_netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fdbf04e3e01a872d0ef2149f846f1a3e3cb54f5b",
              "status": "affected",
              "version": "9431063ad323ac864750aeba4d304389bc42ca4e",
              "versionType": "git"
            },
            {
              "lessThan": "33f016b23a219fe034213849b51436b8e79df251",
              "status": "affected",
              "version": "9431063ad323ac864750aeba4d304389bc42ca4e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/dpll/dpll_core.c",
            "drivers/dpll/dpll_netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "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": "7.2.6",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndpll: fix NULL deref in dpll_device_ops() during teardown race\n\nWhen the last owner of a dpll device unregisters while a foreign driver\nstill holds a pin on it via dpll_pin_on_pin_register(), the dpll object\nstays alive with an empty registration list. A pin notification queued\nbefore the unregister (e.g. ice reacting to zl3073x_i2c removal) then\nwalks pin-\u003edpll_refs into dpll_device_ops(), which trips the WARN_ON and\ndereferences the missing registration. dpll_lock cannot help because the\nnotification work was queued before the unregistering driver took the\nlock.\n\nTreat the empty registration list as a legitimate transient state. Make\ndpll_priv() and dpll_device_ops() return NULL in that case and make\nevery pin netlink path that resolves a device from a pin skip such\ndplls. dpll_cmd_pin_get_one() picks a ref with a live registration and\nreturns -ENODEV when there is none, the pin dumpit skips such a pin\ninstead of aborting the dump, dpll_msg_add_pin_dplls() and the\nfrequency, esync, reference sync and phase adjust set paths skip dead\nrefs, and dpll_pin_parent_device_set() validates the parent with\ndpll_device_get_by_id(). dpll_pin_register() is the last caller that\ndereferenced the device ops without a check, so move its frequency\nmonitor validation under dpll_lock and tolerate a missing registration\nthere as well.\n\nThe empty registration list is equivalent to a cleared DPLL_REGISTERED\nmark, both transitions happen under dpll_lock in dpll_device_register()\nand dpll_device_unregister(). A pin notification for a pin whose dplls\nare all gone is now dropped with -ENODEV instead of crashing, all\ncallers in the core ignore that return value.\n\n WARNING: drivers/dpll/dpll_core.c:1092 at dpll_device_ops+0x24/0x40,\n CPU#83: kworker/u576:3/23471\n Modules linked in: ... ice ... zl3073x_i2c(-) ... zl3073x ...\n Workqueue: ice_dpll_wq ice_dpll_pin_notify_work [ice]\n RIP: 0010:dpll_device_ops+0x24/0x40\n Call Trace:\n  \u003cTASK\u003e\n  dpll_cmd_pin_get_one+0x336/0x520\n  dpll_pin_event_send+0x82/0x140\n  dpll_pin_on_pin_unregister+0xbb/0x160\n  ice_dpll_pin_notify_work+0x1bc/0x1f0 [ice]\n  process_one_work+0x19e/0x370\n  worker_thread+0x1a6/0x310\n  kthread+0xe4/0x120\n  ret_from_fork+0x1a1/0x270\n  ret_from_fork_asm+0x1a/0x30\n  \u003c/TASK\u003e\n ---[ end trace 0000000000000000 ]---\n BUG: kernel NULL pointer dereference, address: 0000000000000010\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:06:40.413Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fdbf04e3e01a872d0ef2149f846f1a3e3cb54f5b"
        },
        {
          "url": "https://git.kernel.org/stable/c/33f016b23a219fe034213849b51436b8e79df251"
        }
      ],
      "title": "dpll: fix NULL deref in dpll_device_ops() during teardown race",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90144",
    "datePublished": "2026-09-17T16:06:40.413Z",
    "dateReserved": "2026-09-11T19:38:34.789Z",
    "dateUpdated": "2026-09-17T16:06:40.413Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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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GHSA-3X44-VFGM-9V7X

CVE-2026-90144 (GCVE-0-2026-90144)

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