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CVE-2026-64602— iio: adc: spear: Initialize completion before requesting IRQ

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于在spear_adc_probe()中先注册中断处理程序再初始化completion，若中断在初始化前到达，complete()会操作未初始化的completion，导致内核崩溃。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.17% · P5

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed< aea8ae6c4d3ed58d9223360f758df6bd8b90c608 affected
b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed< 67a49ab41320b3f721ce4be7447754ff040acbd5 affected
b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed< a50757398794aaa25f908b96c6733e045466cba4 affected
b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed< f3f90bc7b38ba3ff14f131cea0f8eb77624787a8 affected
b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed< 37077d8271b1f24894fbc21bca1c4cd337525d31 affected
b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed< bbfebae473ac2c8a194523b29ccb9b45f02f134c affected
b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed< eb5b07c9d0ec1a9d4b6871b14793c19967d79dc4 affected
b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed< 3ee2128b6f0eb0be7b6cb8f6e0f1f113a65201a0 affected
… +10 more rows
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I. Basic Information for CVE-2026-64602

Vulnerability Information
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Vulnerability Title
iio: adc: spear: Initialize completion before requesting IRQ
Source: CVE Program / CVE List V5
Vulnerability Description
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().
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于在spear_adc_probe()中先注册中断处理程序再初始化completion，若中断在初始化前到达，complete()会操作未初始化的completion，导致内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed ~ aea8ae6c4d3ed58d9223360f758df6bd8b90c608 -
Linux Linux 3.16 -

II. Public POCs for CVE-2026-64602

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III. Intelligence Information for CVE-2026-64602

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Patches & Fixes for CVE-2026-64602 (8)

Same Patch Batch · Linux · 2026-08-06 · 22 CVEs total

CVE-2026-64597 9.8 CRITICAL smb: client: fix double-free in SMB2_close() replay
CVE-2026-64598 8.8 HIGH smb/client: Fix error code in smb2_aead_req_alloc()
CVE-2026-64586 8.8 HIGH wifi: brcmfmac: drain bus_reset work on device removal
CVE-2026-64583 7.8 HIGH usb: gadget: udc: bdc: free IRQ and drain func_wake_notify before teardown
CVE-2026-64584 7.8 HIGH usb: gadget: f_midi: cancel pending IN work before freeing the midi object
CVE-2026-64601 7.8 HIGH ALSA: us144mkii: capture_urb_complete: redundant usb_anchor_urb corrupts anchor list on ea
CVE-2026-64599 7.8 HIGH crypto: amlogic - avoid double cleanup in meson_crypto_probe()
CVE-2026-64585 7.8 HIGH can: esd_usb: kill anchored URBs before freeing netdevs
CVE-2026-64588 7.8 HIGH fuse-uring: fix data races on ring->ready
CVE-2026-64587 7.0 HIGH net: ethernet: arc: emac: quiesce interrupts before requesting IRQ
CVE-2026-64593 btrfs: do not trim a device which is not writeable
CVE-2026-64589 i2c: core: fix NULL-deref on adapter registration failure
CVE-2026-64591 iommu/vt-d: Avoid WARNING in sva unbind path
CVE-2026-64590 dma-buf/udmabuf: skip redundant cpu sync to fix cacheline EEXIST warning
CVE-2026-64592 riscv: mm: Unconditionally sfence.vma for spurious fault
CVE-2026-68480 x86/bugs: Make Safe-RET robust against interrupt injection
CVE-2026-64594 usb: gadget: f_fs: initialize reset_work at allocation time
CVE-2026-64595 HID: hid-lenovo-go: cancel cfg_setup work in hid_go_cfg_remove()
CVE-2026-64596 libfs: set SB_I_NOEXEC and SB_I_NODEV by default in init_pseudo()
CVE-2026-64603 platform/x86: intel-hid: Protect ACPI notify handler against recursion

Showing top 20 of 22 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64602

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