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iio: adc: lpc32xx: Initialize completion before requesting IRQ

Type: advisorySource: OSV1 source record

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().

Announced Source revision 1
Original source ↗

CVE-2026-64500

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:CVE-2026-64500

Kernel

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
5.10.261

Source reference: /affected/1/ranges

5.15.212

Source reference: /affected/1/ranges

6.1.178

Source reference: /affected/1/ranges

6.6.145

Source reference: /affected/1/ranges

6.12.96

Source reference: /affected/1/ranges

6.18.39

Source reference: /affected/1/ranges

7.1.4

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

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        "type": "GIT",
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            "introduced": "7901b2a1453e48c9defff2c97c67d3089bf4df7a"
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          },
          {
            "fixed": "0e33587967b356519aa6f220b5b43c6976320397"
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          {
            "fixed": "1ddf7b6ffb8ebb22b92a184a9eaa76277ef0c7cd"
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            "fixed": "820c4f15353efe9a9429ae86ccceeaf4e0e4e585"
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          {
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            "fixed": "9e2e8b8cdfd37ae7c7a8a5c96c59e98a768731c4"
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          {
            "fixed": "2f18c5551aa97ca7f39dbb151c67c9053ccadc17"
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            "fixed": "e561b35633f450ee607e87a6401d97f156a0cd54"
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        ]
      }
    ],
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    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "4.12.0"
          },
          {
            "fixed": "5.10.261"
          }
        ]
      },
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        "type": "ECOSYSTEM",
        "events": [
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      },
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        "events": [
          {
            "introduced": "6.7.0"
          },
          {
            "fixed": "6.12.96"
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      },
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        "events": [
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            "introduced": "6.13.0"
          },
          {
            "fixed": "6.18.39"
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        "type": "ECOSYSTEM",
        "events": [
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            "introduced": "6.19.0"
          },
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            "fixed": "7.1.4"
          }
        ]
      }
    ],
    "package": {
      "name": "Kernel",
      "ecosystem": "Linux"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64500.json"
    }
  }
]
Related CVEs
CVE-2026-64500

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Event
#50786 · Revision 1
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