Vulnerability-Lookup

CVE-2026-64500 (GCVE-0-2026-64500)

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

Title

iio: adc: lpc32xx: Initialize completion before requesting IRQ

Summary

In the Linux kernel, the following vulnerability has been resolved: iio: adc: lpc32xx: Initialize completion before requesting IRQ In the report from Jaeyoung Chung: "lpc32xx_adc_probe() in drivers/iio/adc/lpc32xx_adc.c registers its interrupt handler with devm_request_irq() before it initializes st->completion with init_completion(). If an interrupt arrives after devm_request_irq() and before init_completion(), the handler calls complete() on an uninitialized completion, causing a kernel panic. The probe path, in lpc32xx_adc_probe(): iodev = devm_iio_device_alloc(&pdev->dev, sizeof(*st)); /* st kzalloc-zeroed */ ... retval = devm_request_irq(&pdev->dev, irq, lpc32xx_adc_isr, 0, LPC32XXAD_NAME, st); /* register handler */ ... init_completion(&st->completion); /* initialize completion */ lpc32xx_adc_isr() calls complete(): complete(&st->completion); If the device raises an interrupt before init_completion() runs, complete() acquires the uninitialized wait.lock and walks the zeroed task_list in swake_up_locked(). The zeroed task_list makes list_empty() return false, so swake_up_locked() dereferences a NULL list entry, triggering a KASAN wild-memory-access." Fix the chance of a spurious IRQ causing an uninitialized pointer dereference by moving init_completion() above devm_request_irq().

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/7090c0d29708ee305…
https://git.kernel.org/stable/c/0e33587967b356519…
https://git.kernel.org/stable/c/1ddf7b6ffb8ebb22b…
https://git.kernel.org/stable/c/820c4f15353efe9a9…
https://git.kernel.org/stable/c/48eccc6caed4e62c0…
https://git.kernel.org/stable/c/9e2e8b8cdfd37ae7c…
https://git.kernel.org/stable/c/2f18c5551aa97ca7f…
https://git.kernel.org/stable/c/e561b35633f450ee6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7901b2a1453e48c9defff2c97c67d3089bf4df7a , < 7090c0d29708ee305022d0ea7b37612b33242fa2 (git) Affected: 7901b2a1453e48c9defff2c97c67d3089bf4df7a , < 0e33587967b356519aa6f220b5b43c6976320397 (git) Affected: 7901b2a1453e48c9defff2c97c67d3089bf4df7a , < 1ddf7b6ffb8ebb22b92a184a9eaa76277ef0c7cd (git) Affected: 7901b2a1453e48c9defff2c97c67d3089bf4df7a , < 820c4f15353efe9a9429ae86ccceeaf4e0e4e585 (git) Affected: 7901b2a1453e48c9defff2c97c67d3089bf4df7a , < 48eccc6caed4e62c0f199ab3a3772fa969cd3b2d (git) Affected: 7901b2a1453e48c9defff2c97c67d3089bf4df7a , < 9e2e8b8cdfd37ae7c7a8a5c96c59e98a768731c4 (git) Affected: 7901b2a1453e48c9defff2c97c67d3089bf4df7a , < 2f18c5551aa97ca7f39dbb151c67c9053ccadc17 (git) Affected: 7901b2a1453e48c9defff2c97c67d3089bf4df7a , < e561b35633f450ee607e87a6401d97f156a0cd54 (git)
Linux	Linux	Affected: 4.12 Unaffected: 0 , < 4.12 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)

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JSON

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: lpc32xx: Initialize completion before requesting IRQ\n\nIn the report from Jaeyoung Chung:\n\n\"lpc32xx_adc_probe() in drivers/iio/adc/lpc32xx_adc.c registers its\ninterrupt handler with devm_request_irq() before it initializes\nst-\u003ecompletion with init_completion(). If an interrupt arrives after\ndevm_request_irq() and before init_completion(), the handler calls\ncomplete() on an uninitialized completion, causing a kernel panic.\n\nThe probe path, in lpc32xx_adc_probe():\n\n    iodev = devm_iio_device_alloc(\u0026pdev-\u003edev, sizeof(*st)); /* st kzalloc-zeroed */\n    ...\n    retval = devm_request_irq(\u0026pdev-\u003edev, irq, lpc32xx_adc_isr, 0,\n                              LPC32XXAD_NAME, st);           /* register handler */\n    ...\n    init_completion(\u0026st-\u003ecompletion);                       /* initialize completion */\n\nlpc32xx_adc_isr() calls complete():\n\n    complete(\u0026st-\u003ecompletion);\n\nIf the device raises an interrupt before init_completion() runs,\ncomplete() acquires the uninitialized wait.lock and walks the zeroed\ntask_list in swake_up_locked(). The zeroed task_list makes list_empty()\nreturn false, so swake_up_locked() dereferences a NULL list entry,\ntriggering a KASAN wild-memory-access.\"\n\nFix the chance of a spurious IRQ causing an uninitialized pointer\ndereference by moving init_completion() above devm_request_irq()."
        }
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    "datePublished": "2026-07-25T08:51:56.053Z",
    "dateReserved": "2026-07-19T15:36:31.793Z",
    "dateUpdated": "2026-07-25T08:51:56.053Z",
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If an interrupt arrives after\\ndevm_request_irq() and before init_completion(), the handler calls\\ncomplete() on an uninitialized completion, causing a kernel panic.\\n\\nThe probe path, in lpc32xx_adc_probe():\\n\\n    iodev = devm_iio_device_alloc(\u0026pdev-\u003edev, sizeof(*st)); /* st kzalloc-zeroed */\\n    ...\\n    retval = devm_request_irq(\u0026pdev-\u003edev, irq, lpc32xx_adc_isr, 0,\\n                              LPC32XXAD_NAME, st);           /* register handler */\\n    ...\\n    init_completion(\u0026st-\u003ecompletion);                       /* initialize completion */\\n\\nlpc32xx_adc_isr() calls complete():\\n\\n    complete(\u0026st-\u003ecompletion);\\n\\nIf the device raises an interrupt before init_completion() runs,\\ncomplete() acquires the uninitialized wait.lock and walks the zeroed\\ntask_list in swake_up_locked(). The zeroed task_list makes list_empty()\\nreturn false, so swake_up_locked() dereferences a NULL list entry,\\ntriggering a KASAN wild-memory-access.\\\"\\n\\nFix the chance of a spurious IRQ causing an uninitialized pointer\\ndereference by moving init_completion() above devm_request_irq().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/iio/adc/lpc32xx_adc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"7901b2a1453e48c9defff2c97c67d3089bf4df7a\",\"lessThan\":\"7090c0d29708ee305022d0ea7b37612b33242fa2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7901b2a1453e48c9defff2c97c67d3089bf4df7a\",\"lessThan\":\"0e33587967b356519aa6f220b5b43c6976320397\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7901b2a1453e48c9defff2c97c67d3089bf4df7a\",\"lessThan\":\"1ddf7b6ffb8ebb22b92a184a9eaa76277ef0c7cd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7901b2a1453e48c9defff2c97c67d3089bf4df7a\",\"lessThan\":\"820c4f15353efe9a9429ae86ccceeaf4e0e4e585\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7901b2a1453e48c9defff2c97c67d3089bf4df7a\",\"lessThan\":\"48eccc6caed4e62c0f199ab3a3772fa969cd3b2d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7901b2a1453e48c9defff2c97c67d3089bf4df7a\",\"lessThan\":\"9e2e8b8cdfd37ae7c7a8a5c96c59e98a768731c4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7901b2a1453e48c9defff2c97c67d3089bf4df7a\",\"lessThan\":\"2f18c5551aa97ca7f39dbb151c67c9053ccadc17\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7901b2a1453e48c9defff2c97c67d3089bf4df7a\",\"lessThan\":\"e561b35633f450ee607e87a6401d97f156a0cd54\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/iio/adc/lpc32xx_adc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"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\":\"6.12.96\",\"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-rc3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0e33587967b356519aa6f220b5b43c6976320397\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1ddf7b6ffb8ebb22b92a184a9eaa76277ef0c7cd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2f18c5551aa97ca7f39dbb151c67c9053ccadc17\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/48eccc6caed4e62c0f199ab3a3772fa969cd3b2d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7090c0d29708ee305022d0ea7b37612b33242fa2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/820c4f15353efe9a9429ae86ccceeaf4e0e4e585\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9e2e8b8cdfd37ae7c7a8a5c96c59e98a768731c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e561b35633f450ee607e87a6401d97f156a0cd54\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

GHSA-H726-JM24-WVQC

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:

iio: adc: lpc32xx: Initialize completion before requesting IRQ

In the report from Jaeyoung Chung:

"lpc32xx_adc_probe() in drivers/iio/adc/lpc32xx_adc.c registers its interrupt handler with devm_request_irq() before it initializes st->completion with init_completion(). If an interrupt arrives after devm_request_irq() and before init_completion(), the handler calls complete() on an uninitialized completion, causing a kernel panic.

The probe path, in lpc32xx_adc_probe():

iodev = devm_iio_device_alloc(&pdev->dev, sizeof(*st)); /* st kzalloc-zeroed */
...
retval = devm_request_irq(&pdev->dev, irq, lpc32xx_adc_isr, 0,
                          LPC32XXAD_NAME, st);           /* register handler */
...
init_completion(&st->completion);                       /* initialize completion */

lpc32xx_adc_isr() calls complete():

complete(&st->completion);

If the device raises an interrupt before init_completion() runs, complete() acquires the uninitialized wait.lock and walks the zeroed task_list in swake_up_locked(). The zeroed task_list makes list_empty() return false, so swake_up_locked() dereferences a NULL list entry, triggering a KASAN wild-memory-access."

Fix the chance of a spurious IRQ causing an uninitialized pointer dereference by moving init_completion() above devm_request_irq().

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64500"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:35Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: lpc32xx: Initialize completion before requesting IRQ\n\nIn the report from Jaeyoung Chung:\n\n\"lpc32xx_adc_probe() in drivers/iio/adc/lpc32xx_adc.c registers its\ninterrupt handler with devm_request_irq() before it initializes\nst-\u003ecompletion with init_completion(). If an interrupt arrives after\ndevm_request_irq() and before init_completion(), the handler calls\ncomplete() on an uninitialized completion, causing a kernel panic.\n\nThe probe path, in lpc32xx_adc_probe():\n\n    iodev = devm_iio_device_alloc(\u0026pdev-\u003edev, sizeof(*st)); /* st kzalloc-zeroed */\n    ...\n    retval = devm_request_irq(\u0026pdev-\u003edev, irq, lpc32xx_adc_isr, 0,\n                              LPC32XXAD_NAME, st);           /* register handler */\n    ...\n    init_completion(\u0026st-\u003ecompletion);                       /* initialize completion */\n\nlpc32xx_adc_isr() calls complete():\n\n    complete(\u0026st-\u003ecompletion);\n\nIf the device raises an interrupt before init_completion() runs,\ncomplete() acquires the uninitialized wait.lock and walks the zeroed\ntask_list in swake_up_locked(). The zeroed task_list makes list_empty()\nreturn false, so swake_up_locked() dereferences a NULL list entry,\ntriggering a KASAN wild-memory-access.\"\n\nFix the chance of a spurious IRQ causing an uninitialized pointer\ndereference by moving init_completion() above devm_request_irq().",
  "id": "GHSA-h726-jm24-wvqc",
  "modified": "2026-07-25T12:31:38Z",
  "published": "2026-07-25T12:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64500"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e33587967b356519aa6f220b5b43c6976320397"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ddf7b6ffb8ebb22b92a184a9eaa76277ef0c7cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f18c5551aa97ca7f39dbb151c67c9053ccadc17"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48eccc6caed4e62c0f199ab3a3772fa969cd3b2d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7090c0d29708ee305022d0ea7b37612b33242fa2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/820c4f15353efe9a9429ae86ccceeaf4e0e4e585"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e2e8b8cdfd37ae7c7a8a5c96c59e98a768731c4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e561b35633f450ee607e87a6401d97f156a0cd54"
    }
  ],
  "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-2026-64500 (GCVE-0-2026-64500)

GHSA-H726-JM24-WVQC

Tags

Sightings

Nomenclature