Vulnerability-Lookup

CVE-2026-64428 (GCVE-0-2026-64428)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-07-25 08:51

Title

gpio: sch: use raw_spinlock_t in the irq startup path

Summary

In the Linux kernel, the following vulnerability has been resolved: gpio: sch: use raw_spinlock_t in the irq startup path sch_irq_unmask() enables the GPIO IRQ and then updates the controller state through sch_irq_mask_unmask(), which takes sch->lock with spin_lock_irqsave(). The callback can be reached from irq_startup() while setting up a requested IRQ. That path is not sleepable, but on PREEMPT_RT a regular spinlock_t becomes a sleeping lock. This issue was found by our static analysis tool and then manually reviewed against the current tree. The grounded PoC kept the request_threaded_irq() -> __setup_irq() -> irq_startup() -> sch_irq_unmask() -> sch_irq_mask_unmask() carrier and used the original spin_lock_irqsave(&sch->lock) edge. Lockdep reported: BUG: sleeping function called from invalid context hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv] sch_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv] sch_irq_mask_unmask.constprop.0+0x31/0x70 [vuln_msv] __setup_irq.constprop.0+0xd/0x30 [vuln_msv] Convert the SCH controller lock to raw_spinlock_t. The same lock is also used by the GPIO direction and value callbacks, but those critical sections only update MMIO-backed GPIO registers and do not contain sleepable operations. Keeping this register lock non-sleeping is therefore appropriate for the irqchip callbacks and does not change the GPIO-side locking contract.

Severity

No CVSS data available.

Assigner

Linux

References

7 references

URL	Tags
https://git.kernel.org/stable/c/3b1aa05ec27eeccc8…
https://git.kernel.org/stable/c/4f03a15cc73c83740…
https://git.kernel.org/stable/c/7a550256d68bbdfa0…
https://git.kernel.org/stable/c/a235cec779bb39ec8…
https://git.kernel.org/stable/c/4508366ab7dd0c291…
https://git.kernel.org/stable/c/41cad91a09d69e8ff…
https://git.kernel.org/stable/c/286533cb14a3c8a8b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < 3b1aa05ec27eeccc889ecaa3f2d9baa9f453e50d (git) Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < 4f03a15cc73c83740fc355ee22b336492d17b4da (git) Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < 7a550256d68bbdfa0903ab1c4595c04a6815493a (git) Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < a235cec779bb39ec8f961a935b28a2ce278c6c64 (git) Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < 4508366ab7dd0c2917a51a9c2e23cc1b9d35157a (git) Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < 41cad91a09d69e8fff4e936db29b1054b4e9f9f7 (git) Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < 286533cb14a3c8a8bd39ff64ea2fc8e1aa0f638b (git)
Linux	Linux	Affected: 5.13 Unaffected: 0 , < 5.13 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

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{
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          "programFiles": [
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              "status": "unaffected",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: sch: use raw_spinlock_t in the irq startup path\n\nsch_irq_unmask() enables the GPIO IRQ and then updates the controller\nstate through sch_irq_mask_unmask(), which takes sch-\u003elock with\nspin_lock_irqsave().  The callback can be reached from irq_startup()\nwhile setting up a requested IRQ.  That path is not sleepable, but on\nPREEMPT_RT a regular spinlock_t becomes a sleeping lock.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the request_threaded_irq() -\u003e __setup_irq() -\u003e\nirq_startup() -\u003e sch_irq_unmask() -\u003e sch_irq_mask_unmask() carrier and\nused the original spin_lock_irqsave(\u0026sch-\u003elock) edge.  Lockdep reported:\n\n  BUG: sleeping function called from invalid context\n  hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]\n  sch_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]\n  sch_irq_mask_unmask.constprop.0+0x31/0x70 [vuln_msv]\n  __setup_irq.constprop.0+0xd/0x30 [vuln_msv]\n\nConvert the SCH controller lock to raw_spinlock_t.  The same lock is\nalso used by the GPIO direction and value callbacks, but those critical\nsections only update MMIO-backed GPIO registers and do not contain\nsleepable operations.  Keeping this register lock non-sleeping is\ntherefore appropriate for the irqchip callbacks and does not change the\nGPIO-side locking contract."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:51:05.460Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/3b1aa05ec27eeccc889ecaa3f2d9baa9f453e50d"
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          "url": "https://git.kernel.org/stable/c/4f03a15cc73c83740fc355ee22b336492d17b4da"
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          "url": "https://git.kernel.org/stable/c/4508366ab7dd0c2917a51a9c2e23cc1b9d35157a"
        },
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          "url": "https://git.kernel.org/stable/c/41cad91a09d69e8fff4e936db29b1054b4e9f9f7"
        },
        {
          "url": "https://git.kernel.org/stable/c/286533cb14a3c8a8bd39ff64ea2fc8e1aa0f638b"
        }
      ],
      "title": "gpio: sch: use raw_spinlock_t in the irq startup path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
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    "cveId": "CVE-2026-64428",
    "datePublished": "2026-07-25T08:51:05.460Z",
    "dateReserved": "2026-07-19T15:36:31.787Z",
    "dateUpdated": "2026-07-25T08:51:05.460Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "cve": "CVE-2026-64428",
      "date": "2026-07-26",
      "epss": "0.00173",
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    },
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That path is not sleepable, but on\\nPREEMPT_RT a regular spinlock_t becomes a sleeping lock.\\n\\nThis issue was found by our static analysis tool and then manually\\nreviewed against the current tree.\\n\\nThe grounded PoC kept the request_threaded_irq() -\u003e __setup_irq() -\u003e\\nirq_startup() -\u003e sch_irq_unmask() -\u003e sch_irq_mask_unmask() carrier and\\nused the original spin_lock_irqsave(\u0026sch-\u003elock) edge.  Lockdep reported:\\n\\n  BUG: sleeping function called from invalid context\\n  hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]\\n  sch_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]\\n  sch_irq_mask_unmask.constprop.0+0x31/0x70 [vuln_msv]\\n  __setup_irq.constprop.0+0xd/0x30 [vuln_msv]\\n\\nConvert the SCH controller lock to raw_spinlock_t.  The same lock is\\nalso used by the GPIO direction and value callbacks, but those critical\\nsections only update MMIO-backed GPIO registers and do not contain\\nsleepable operations.  Keeping this register lock non-sleeping is\\ntherefore appropriate for the irqchip callbacks and does not change the\\nGPIO-side locking contract.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpio/gpio-sch.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"7a81638485c1a62a87b4c391ecc9c651a4a9dc19\",\"lessThan\":\"3b1aa05ec27eeccc889ecaa3f2d9baa9f453e50d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7a81638485c1a62a87b4c391ecc9c651a4a9dc19\",\"lessThan\":\"4f03a15cc73c83740fc355ee22b336492d17b4da\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7a81638485c1a62a87b4c391ecc9c651a4a9dc19\",\"lessThan\":\"7a550256d68bbdfa0903ab1c4595c04a6815493a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7a81638485c1a62a87b4c391ecc9c651a4a9dc19\",\"lessThan\":\"a235cec779bb39ec8f961a935b28a2ce278c6c64\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7a81638485c1a62a87b4c391ecc9c651a4a9dc19\",\"lessThan\":\"4508366ab7dd0c2917a51a9c2e23cc1b9d35157a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7a81638485c1a62a87b4c391ecc9c651a4a9dc19\",\"lessThan\":\"41cad91a09d69e8fff4e936db29b1054b4e9f9f7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7a81638485c1a62a87b4c391ecc9c651a4a9dc19\",\"lessThan\":\"286533cb14a3c8a8bd39ff64ea2fc8e1aa0f638b\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpio/gpio-sch.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/286533cb14a3c8a8bd39ff64ea2fc8e1aa0f638b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3b1aa05ec27eeccc889ecaa3f2d9baa9f453e50d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/41cad91a09d69e8fff4e936db29b1054b4e9f9f7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4508366ab7dd0c2917a51a9c2e23cc1b9d35157a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4f03a15cc73c83740fc355ee22b336492d17b4da\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7a550256d68bbdfa0903ab1c4595c04a6815493a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a235cec779bb39ec8f961a935b28a2ce278c6c64\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T15:59:32Z",
      "cve": "CVE-2026-64428",
      "id": "CVE-2026-64428",
      "initial_release_date": "2026-07-25T15:59:32Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64428",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64428.json",
      "version": "2"
    }
  }
}

GHSA-3JVV-RP8P-Q944

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

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

gpio: sch: use raw_spinlock_t in the irq startup path

sch_irq_unmask() enables the GPIO IRQ and then updates the controller state through sch_irq_mask_unmask(), which takes sch->lock with spin_lock_irqsave(). The callback can be reached from irq_startup() while setting up a requested IRQ. That path is not sleepable, but on PREEMPT_RT a regular spinlock_t becomes a sleeping lock.

This issue was found by our static analysis tool and then manually reviewed against the current tree.

The grounded PoC kept the request_threaded_irq() -> __setup_irq() -> irq_startup() -> sch_irq_unmask() -> sch_irq_mask_unmask() carrier and used the original spin_lock_irqsave(&sch->lock) edge. Lockdep reported:

BUG: sleeping function called from invalid context hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv] sch_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv] sch_irq_mask_unmask.constprop.0+0x31/0x70 [vuln_msv] __setup_irq.constprop.0+0xd/0x30 [vuln_msv]

Convert the SCH controller lock to raw_spinlock_t. The same lock is also used by the GPIO direction and value callbacks, but those critical sections only update MMIO-backed GPIO registers and do not contain sleepable operations. Keeping this register lock non-sleeping is therefore appropriate for the irqchip callbacks and does not change the GPIO-side locking contract.

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64428"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:26Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: sch: use raw_spinlock_t in the irq startup path\n\nsch_irq_unmask() enables the GPIO IRQ and then updates the controller\nstate through sch_irq_mask_unmask(), which takes sch-\u003elock with\nspin_lock_irqsave().  The callback can be reached from irq_startup()\nwhile setting up a requested IRQ.  That path is not sleepable, but on\nPREEMPT_RT a regular spinlock_t becomes a sleeping lock.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the request_threaded_irq() -\u003e __setup_irq() -\u003e\nirq_startup() -\u003e sch_irq_unmask() -\u003e sch_irq_mask_unmask() carrier and\nused the original spin_lock_irqsave(\u0026sch-\u003elock) edge.  Lockdep reported:\n\n  BUG: sleeping function called from invalid context\n  hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]\n  sch_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]\n  sch_irq_mask_unmask.constprop.0+0x31/0x70 [vuln_msv]\n  __setup_irq.constprop.0+0xd/0x30 [vuln_msv]\n\nConvert the SCH controller lock to raw_spinlock_t.  The same lock is\nalso used by the GPIO direction and value callbacks, but those critical\nsections only update MMIO-backed GPIO registers and do not contain\nsleepable operations.  Keeping this register lock non-sleeping is\ntherefore appropriate for the irqchip callbacks and does not change the\nGPIO-side locking contract.",
  "id": "GHSA-3jvv-rp8p-q944",
  "modified": "2026-07-25T12:31:35Z",
  "published": "2026-07-25T12:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64428"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/286533cb14a3c8a8bd39ff64ea2fc8e1aa0f638b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b1aa05ec27eeccc889ecaa3f2d9baa9f453e50d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41cad91a09d69e8fff4e936db29b1054b4e9f9f7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4508366ab7dd0c2917a51a9c2e23cc1b9d35157a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f03a15cc73c83740fc355ee22b336492d17b4da"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a550256d68bbdfa0903ab1c4595c04a6815493a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a235cec779bb39ec8f961a935b28a2ce278c6c64"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

Action not permitted

CVE-2026-64428 (GCVE-0-2026-64428)

GHSA-3JVV-RP8P-Q944

Tags

Sightings

Nomenclature