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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.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 存在安全漏洞，该漏洞源于gpio ml-ioh驱动寄存器锁使用不当，在PREEMPT_RT环境下于不可睡眠的上下文中获取spinlock_t锁，可能导致内核崩溃或死锁。

AI Predicted 5.5 Difficulty: Hard EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1021 · Remote Services

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 54be566317b6aece2389a95bb19ea209af9359be< 431b10133113537660a6090a2856b0d74d1b06de affected
54be566317b6aece2389a95bb19ea209af9359be< 359e6b1168c9a62a7bd214ace476aaa2d57eebe8 affected
54be566317b6aece2389a95bb19ea209af9359be< 63d2230e5076c12f93d2a1d1bff2fbbf6cf32f3c affected
54be566317b6aece2389a95bb19ea209af9359be< b6505a4cea45dd92eb753581b1ad9b524b5fcc34 affected
54be566317b6aece2389a95bb19ea209af9359be< 84be002b40d30c56a91873b236e2d9001bbee363 affected
54be566317b6aece2389a95bb19ea209af9359be< bc7934d0acd4fc1c7e5b7c68debdb4a991121628 affected
54be566317b6aece2389a95bb19ea209af9359be< 0559b86611c35d342dd48542ea26a9e437046bf6 affected
54be566317b6aece2389a95bb19ea209af9359be< 600411ea1f2443fdf5b1af9b6480f616d7aff9d0 affected
… +10 more rows
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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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 存在安全漏洞，该漏洞源于gpio ml-ioh驱动寄存器锁使用不当，在PREEMPT_RT环境下于不可睡眠的上下文中获取spinlock_t锁，可能导致内核崩溃或死锁。
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 54be566317b6aece2389a95bb19ea209af9359be ~ 431b10133113537660a6090a2856b0d74d1b06de -
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)

Other References for CVE-2026-80562 (5)

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

CVE-2026-80519 9.8 CRITICAL ovpn: finish crypto callback cleanup before peer release
CVE-2026-74743 9.8 CRITICAL macvlan: inherit needed_headroom and needed_tailroom from lowerdev
CVE-2026-74737 9.8 CRITICAL net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
CVE-2026-80586 9.8 CRITICAL mptcp: options: reset DSS fields in case of unexpected size
CVE-2026-80587 9.8 CRITICAL mptcp: avoid combining some incoming suboptions
CVE-2026-74744 9.8 CRITICAL ipvlan: inherit needed_headroom and needed_tailroom from phy_dev
CVE-2026-74746 9.8 CRITICAL netfilter: flowtable: publish GC-visible tuple last
CVE-2026-80557 9.8 CRITICAL libceph: fix OOB read in decode_watchers() via missing bounds check
CVE-2026-80558 9.8 CRITICAL libceph: Avoid using invalid osd indices from primary_temp
CVE-2026-80561 9.8 CRITICAL libceph: fix multiple unsafe decodes in decode_locker()
CVE-2026-80528 9.8 CRITICAL ceph: avoid fs reclaim while using current->journal_info
CVE-2026-74752 9.8 CRITICAL sctp: validate cookie AUTH state before use
CVE-2026-80589 9.8 CRITICAL block: stop the timeout timer when releasing a never added disk
CVE-2026-74751 9.4 CRITICAL riscv: lib: Fix ZBB strnlen reading past count boundary
CVE-2026-80585 9.4 CRITICAL mptcp: fastopen: only mark MPTFO subflows with SYN data
CVE-2026-80551 9.3 CRITICAL s390/vfio_ccw: Ensure first IDAW remains constant
CVE-2026-80554 9.3 CRITICAL s390/vfio_ccw: Limit the number of channel program segments
CVE-2026-80553 8.8 HIGH s390/vfio_ccw: Cancel existing workqueues
CVE-2026-80552 8.8 HIGH s390/vfio_ccw: Ensure index for read/write regions are within range
CVE-2026-80576 8.8 HIGH drm/amdgpu: reject oversized IBs with per-ring packet limits

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80562

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