CVE-2026-64602 (GCVE-0-2026-64602)
Vulnerability from cvelistv5
Published
2026-08-06 07:13
Modified
2026-08-17 04:58
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
iio: adc: spear: Initialize completion before requesting IRQ
In the report from Jaeyoung Chung:
"spear_adc_probe() in drivers/iio/adc/spear_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 spear_adc_probe():
iodev = devm_iio_device_alloc(&pdev->dev, sizeof(*st)); /* st kzalloc-zeroed */
...
retval = devm_request_irq(&pdev->dev, irq, spear_adc_isr, 0,
LPC32XXAD_NAME, st); /* register handler */
...
init_completion(&st->completion); /* initialize completion */
spear_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().
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed Version: b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed Version: b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed Version: b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed Version: b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed Version: b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed Version: b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed Version: b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed |
||
{
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: spear: Initialize completion before requesting IRQ\n\nIn the report from Jaeyoung Chung:\n\n\"spear_adc_probe() in drivers/iio/adc/spear_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 spear_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, spear_adc_isr, 0,\n LPC32XXAD_NAME, st); /* register handler */\n ...\n init_completion(\u0026st-\u003ecompletion); /* initialize completion */\n\nspear_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()."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:58:25.306Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/aea8ae6c4d3ed58d9223360f758df6bd8b90c608"
},
{
"url": "https://git.kernel.org/stable/c/67a49ab41320b3f721ce4be7447754ff040acbd5"
},
{
"url": "https://git.kernel.org/stable/c/a50757398794aaa25f908b96c6733e045466cba4"
},
{
"url": "https://git.kernel.org/stable/c/f3f90bc7b38ba3ff14f131cea0f8eb77624787a8"
},
{
"url": "https://git.kernel.org/stable/c/37077d8271b1f24894fbc21bca1c4cd337525d31"
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{
"url": "https://git.kernel.org/stable/c/bbfebae473ac2c8a194523b29ccb9b45f02f134c"
},
{
"url": "https://git.kernel.org/stable/c/eb5b07c9d0ec1a9d4b6871b14793c19967d79dc4"
},
{
"url": "https://git.kernel.org/stable/c/3ee2128b6f0eb0be7b6cb8f6e0f1f113a65201a0"
}
],
"title": "iio: adc: spear: Initialize completion before requesting IRQ",
"x_generator": {
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}
}
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"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64602",
"datePublished": "2026-08-06T07:13:54.519Z",
"dateReserved": "2026-07-19T15:36:31.799Z",
"dateUpdated": "2026-08-17T04:58:25.306Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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