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

Vulnerability from cvelistv5 – Published: 2026-09-17 16:06 – Updated: 2026-10-21 12:50
VLAI
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 CNA under the mitre root
CNA scorecard D 53/100 over 6846 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9431063ad323ac864750aeba4d304389bc42ca4e , < 7d9661d6ef60bee705a3bb220dc59f10d9155c31 (git)
Affected: 9431063ad323ac864750aeba4d304389bc42ca4e , < d39da3ff8d39c31761bf1698bc02a5a206722136 (git)
Affected: 9431063ad323ac864750aeba4d304389bc42ca4e , < fdbf04e3e01a872d0ef2149f846f1a3e3cb54f5b (git)
Affected: 9431063ad323ac864750aeba4d304389bc42ca4e , < 33f016b23a219fe034213849b51436b8e79df251 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.114 , ≤ 6.12.* (semver)
Unaffected: 6.18.57 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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      "descriptions": [
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          "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": "2026-10-21T12:50:03.630Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/7d9661d6ef60bee705a3bb220dc59f10d9155c31"
        },
        {
          "url": "https://git.kernel.org/stable/c/d39da3ff8d39c31761bf1698bc02a5a206722136"
        },
        {
          "url": "https://git.kernel.org/stable/c/fdbf04e3e01a872d0ef2149f846f1a3e3cb54f5b"
        },
        {
          "url": "https://git.kernel.org/stable/c/33f016b23a219fe034213849b51436b8e79df251"
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      ],
      "title": "dpll: fix NULL deref in dpll_device_ops() during teardown race",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90144",
    "datePublished": "2026-09-17T16:06:40.413Z",
    "dateReserved": "2026-09-11T19:38:34.789Z",
    "dateUpdated": "2026-10-21T12:50:03.630Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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      "date": "2026-11-03",
      "epss": "0.00209",
      "percentile": "0.11082"
    },
    "microsoft_vex": {
      "current_release_date": "2026-10-21T18:38:59.000Z",
      "cve": "CVE-2026-90144",
      "id": "msrc_CVE-2026-90144",
      "initial_release_date": "2026-10-20T22:22:40.000Z",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "dpll: fix NULL deref in dpll_device_ops() during teardown race",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-90144.json",
      "version": "2"
    },
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                "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": [
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                "vendor": "Linux",
                "versions": [
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                    "versionType": "semver"
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                    "version": "7.2.6",
                    "versionType": "semver"
                  },
                  {
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                    "version": "7.3",
                    "versionType": "original_commit_for_fix"
                  }
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              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "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"
          }
        ],
        "id": "CVE-2026-90144",
        "lastModified": "2026-10-21T13:20:39.300",
        "metrics": {},
        "published": "2026-09-17T17:17:07.233",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/33f016b23a219fe034213849b51436b8e79df251"
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          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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            "url": "https://git.kernel.org/stable/c/fdbf04e3e01a872d0ef2149f846f1a3e3cb54f5b"
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-10-13T14:47:25+00:00",
      "cve": "CVE-2026-90144",
      "id": "CVE-2026-90144",
      "initial_release_date": "2026-09-17T00:00:00+00:00",
      "product_status:known_affected": "186",
      "product_status:known_not_affected": "91",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: dpll: fix NULL deref in dpll_device_ops() during teardown race",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90144.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-20T00:45:53Z",
      "cve": "CVE-2026-90144",
      "id": "CVE-2026-90144",
      "initial_release_date": "2026-09-21T16:32:19Z",
      "product_status:known_affected": "109",
      "product_status:known_not_affected": "239",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-90144",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-90144.json",
      "version": "5"
    }
  }
}



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