iio: adc: lpc32xx: Initialize completion before requesting IRQ

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64500
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:35 UTC
Updated2026-07-25 10:17:35 UTC
DescriptionIn 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().

Risk And Classification

EPSS: 0.001650000 probability, percentile 0.061440000 (date 2026-07-28)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7901b2a1453e48c9defff2c97c67d3089bf4df7a 7090c0d29708ee305022d0ea7b37612b33242fa2 git Not specified
CNA Linux Linux affected 7901b2a1453e48c9defff2c97c67d3089bf4df7a 0e33587967b356519aa6f220b5b43c6976320397 git Not specified
CNA Linux Linux affected 7901b2a1453e48c9defff2c97c67d3089bf4df7a 1ddf7b6ffb8ebb22b92a184a9eaa76277ef0c7cd git Not specified
CNA Linux Linux affected 7901b2a1453e48c9defff2c97c67d3089bf4df7a 820c4f15353efe9a9429ae86ccceeaf4e0e4e585 git Not specified
CNA Linux Linux affected 7901b2a1453e48c9defff2c97c67d3089bf4df7a 48eccc6caed4e62c0f199ab3a3772fa969cd3b2d git Not specified
CNA Linux Linux affected 7901b2a1453e48c9defff2c97c67d3089bf4df7a 9e2e8b8cdfd37ae7c7a8a5c96c59e98a768731c4 git Not specified
CNA Linux Linux affected 7901b2a1453e48c9defff2c97c67d3089bf4df7a 2f18c5551aa97ca7f39dbb151c67c9053ccadc17 git Not specified
CNA Linux Linux affected 7901b2a1453e48c9defff2c97c67d3089bf4df7a e561b35633f450ee607e87a6401d97f156a0cd54 git Not specified
CNA Linux Linux affected 4.12 Not specified
CNA Linux Linux unaffected 4.12 semver Not specified
CNA Linux Linux unaffected 5.10.261 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.96 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.39 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/48eccc6caed4e62c0f199ab3a3772fa969cd3b2d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1ddf7b6ffb8ebb22b92a184a9eaa76277ef0c7cd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7090c0d29708ee305022d0ea7b37612b33242fa2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2f18c5551aa97ca7f39dbb151c67c9053ccadc17 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e561b35633f450ee607e87a6401d97f156a0cd54 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9e2e8b8cdfd37ae7c7a8a5c96c59e98a768731c4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0e33587967b356519aa6f220b5b43c6976320397 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/820c4f15353efe9a9429ae86ccceeaf4e0e4e585 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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