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CVE-2026-80562— gpio: ml-ioh: use raw_spinlock_t for the register lock

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.

在 Linux 内核中，已修复以下漏洞： gpio: ml-ioh：对寄存器锁使用 被注册为 的 回调，并通过 获取 。该回调的调用路径为 → → ，此时调用方持有 （一个 ），并且硬件中断已被禁用。该上下文不可睡眠，但在 PREEMPT_RT 下，普通的 是一个由 rtmutex 支持的睡眠锁，因此在此上下文中获取它是不合法的。 和 从 / 回调中获取相同的锁，而这些回调同样是在持有 的情况下被调用的。 将寄存器锁转换为 。同一把锁还用于串行化 GPIO 方向/值回调以及挂起/恢复时的寄存器保存/恢复操作，这些临

AI Predicted 5.5 Difficulty: Hard

Possible ATT&CK Techniques 1 AI

T1021 · Remote Services

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 54be566317b6aece2389a95bb19ea209af9359be< bc7934d0acd4fc1c7e5b7c68debdb4a991121628 affected
54be566317b6aece2389a95bb19ea209af9359be< 0559b86611c35d342dd48542ea26a9e437046bf6 affected
54be566317b6aece2389a95bb19ea209af9359be< 600411ea1f2443fdf5b1af9b6480f616d7aff9d0 affected
3.2 affected
< 3.2 unaffected
6.18.46≤ 6.18.* unaffected
7.1.10≤ 7.1.* unaffected
7.2≤ * unaffected
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I. Basic Information for CVE-2026-80562

Vulnerability Information
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Vulnerability Title
gpio: ml-ioh: use raw_spinlock_t for the register lock
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: gpio: ml-ioh: use raw_spinlock_t for the register lock ioh_irq_type() is registered as the irq_chip .irq_set_type callback and takes chip->spinlock with spin_lock_irqsave(). This callback is reached from __setup_irq() -> __irq_set_trigger() -> chip->irq_set_type() while the caller holds desc->lock, a raw_spinlock_t, with hardirqs disabled. That context is not sleepable, but on PREEMPT_RT a regular spinlock_t is an rtmutex-backed sleeping lock, so acquiring it there is invalid. ioh_irq_enable() and ioh_irq_disable() take the same lock from the .irq_enable/.irq_disable callbacks, which are likewise invoked with desc->lock held. Convert the register lock to raw_spinlock_t. The same lock also serializes the GPIO direction/value callbacks and the suspend/resume register save/restore, and those critical sections only perform short sequences of MMIO register accesses (ioread32()/iowrite32()); the .irq_set_type callback additionally emits a dev_warn() on an unsupported type. None of these are sleepable operations, so keeping this register lock non-sleeping is appropriate for the irqchip callbacks and does not change the GPIO-side locking contract. This is the same fix as commit a02b8950d619 ("gpio: pch: use raw_spinlock_t for the register lock"); this driver shares the same structure as gpio-pch.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 54be566317b6aece2389a95bb19ea209af9359be ~ bc7934d0acd4fc1c7e5b7c68debdb4a991121628 -
Linux Linux 3.2 -

II. Public POCs for CVE-2026-80562

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III. Intelligence Information for CVE-2026-80562

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Patches & Fixes for CVE-2026-80562 (3)

Same Patch Batch · Linux · 2026-08-26 · 92 CVEs total

CVE-2026-80557 libceph: fix OOB read in decode_watchers() via missing bounds check
CVE-2026-80553 s390/vfio_ccw: Cancel existing workqueues
CVE-2026-80552 s390/vfio_ccw: Ensure index for read/write regions are within range
CVE-2026-80549 s390/vfio_ccw: Move cp cleanup out of not operational
CVE-2026-80546 s390/zcrypt: Improve CCA CPRB length and overflow checks
CVE-2026-80547 s390/vfio_ccw: Implement a crw lock
CVE-2026-80545 s390/zcrypt: Improve EP11 CPRB length and overflow checks
CVE-2026-80543 s390/zcrypt: Pad trailing CCA or EP11 message with zeros
CVE-2026-80548 s390/vfio_ccw: Selectively expand io_mutex
CVE-2026-80555 s390/vfio_ccw: Free all memory if cp_init() fails
CVE-2026-80554 s390/vfio_ccw: Limit the number of channel program segments
CVE-2026-80556 mmc: atmel-mci: Fix use-after-free in atmci_remove due to race condition
CVE-2026-80559 Input: sur40 - fix input device registration ordering
CVE-2026-80558 libceph: Avoid using invalid osd indices from primary_temp
CVE-2026-80560 openrisc: signal: do not restore privileged SR bits on sigreturn
CVE-2026-80561 libceph: fix multiple unsafe decodes in decode_locker()
CVE-2026-80563 gpio: sloppy-logic-analyzer: fix use-after-free via debugfs trigger on unbind
CVE-2026-80564 gve: fix NULL dereference due to missing ptp adjfine
CVE-2026-80565 crypto: qce - fix error path in devm_qce_register_algs
CVE-2026-80566 Input: hynitron_cstxxx - validate touch count and finger IDs

Showing top 20 of 92 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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