iio: adc: spear: Initialize completion before requesting IRQ

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64602
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-06 08:16:35 UTC
Updated2026-08-06 08:16:35 UTC
DescriptionIn 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().

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed aea8ae6c4d3ed58d9223360f758df6bd8b90c608 git Not specified
CNA Linux Linux affected b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed 67a49ab41320b3f721ce4be7447754ff040acbd5 git Not specified
CNA Linux Linux affected b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed a50757398794aaa25f908b96c6733e045466cba4 git Not specified
CNA Linux Linux affected b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed f3f90bc7b38ba3ff14f131cea0f8eb77624787a8 git Not specified
CNA Linux Linux affected b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed 37077d8271b1f24894fbc21bca1c4cd337525d31 git Not specified
CNA Linux Linux affected b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed bbfebae473ac2c8a194523b29ccb9b45f02f134c git Not specified
CNA Linux Linux affected b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed eb5b07c9d0ec1a9d4b6871b14793c19967d79dc4 git Not specified
CNA Linux Linux affected b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed 3ee2128b6f0eb0be7b6cb8f6e0f1f113a65201a0 git Not specified
CNA Linux Linux affected 3.16 Not specified
CNA Linux Linux unaffected 3.16 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/aea8ae6c4d3ed58d9223360f758df6bd8b90c608 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3ee2128b6f0eb0be7b6cb8f6e0f1f113a65201a0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/37077d8271b1f24894fbc21bca1c4cd337525d31 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/67a49ab41320b3f721ce4be7447754ff040acbd5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/eb5b07c9d0ec1a9d4b6871b14793c19967d79dc4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bbfebae473ac2c8a194523b29ccb9b45f02f134c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a50757398794aaa25f908b96c6733e045466cba4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f3f90bc7b38ba3ff14f131cea0f8eb77624787a8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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