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CVE-2026-99189— gpio: mxc: fix race between chained IRQ handler install and probe completion

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，以下漏洞已得到修复： gpio: mxc：修复链式中断处理程序安装与探测完成之间的竞态条件 mxc_update_irq_chained_handler() 在 IRQ 域、通用 IRQ 芯片以及端口列表条目设置完成之前被调用。若在此时间窗口内发生中断，将导致以下问题： mx3_gpio_irq_handler() 会调用 generic_handle_domain_irq()，此时 port->domain 仍为 NULL； mx2_gpio_irq_handler() 会遍历 mxc_g

AI Predicted 7.8 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 5f6d1998adeb5374ef248b5ba2e2a0c30ab0f60b< 261802c14e1a3281987ea8f106701e5ed9652f68 affected
5f6d1998adeb5374ef248b5ba2e2a0c30ab0f60b< 6c1e035d881579a6e4ed1ce5feabb13d23e80a82 affected
5f6d1998adeb5374ef248b5ba2e2a0c30ab0f60b< 38d44f78f041ffe60c8e2443b99434a199e7541d affected
6.6 affected
< 6.6 unaffected
6.18.59≤ 6.18.* unaffected
7.2.13≤ 7.2.* unaffected
7.3≤ * unaffected
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I. Basic Information for CVE-2026-99189

Vulnerability Information
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Vulnerability Title
gpio: mxc: fix race between chained IRQ handler install and probe completion
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: gpio: mxc: fix race between chained IRQ handler install and probe completion mxc_update_irq_chained_handler() is called before the IRQ domain, the generic IRQ chip, and the port list entry are set up. If an interrupt arrives in that window: - mx3_gpio_irq_handler() calls generic_handle_domain_irq() with port->domain still NULL. - mx2_gpio_irq_handler() walks mxc_gpio_ports, but the port has not been added to the list yet. Additionally, if any of the subsequent probe steps (gpio_generic_chip_init(), devm_gpiochip_add_data(), irq_domain_create_legacy(), or mxc_gpio_init_gc()) fail, the error paths never unregister the chained handler, leaving a dangling handler that points at freed memory. Move the handler installation after all its dependencies are ready and after list_add_tail(), so the handler is never live while the data structures it touches are incomplete, and is never installed if probe fails.
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 5f6d1998adeb5374ef248b5ba2e2a0c30ab0f60b ~ 261802c14e1a3281987ea8f106701e5ed9652f68 -
Linux Linux 6.6 -

II. Public POCs for CVE-2026-99189

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III. Intelligence Information for CVE-2026-99189

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Patches & Fixes for CVE-2026-99189 (3)

Same Patch Batch · Linux · 2026-10-28 · 117 CVEs total

CVE-2026-99143 tracing: Keep the predicate limit separate from program capacity
CVE-2026-99129 selinux: fix BPF token permission checks
CVE-2026-99130 io_uring/cancel: don't spin on local work the task can't run
CVE-2026-99131 xfs: fix capability check in xfs
CVE-2026-99133 net/iucv: fix the recvmsg window update
CVE-2026-99132 xfs: don't hold buffer locks across sync transaction commit in xfs_sync_sb_buf
CVE-2026-99134 mac802154: fix data race and NULL deref on local->assoc_dev
CVE-2026-99135 dm-integrity: fix infinite loop on discard with large tag size
CVE-2026-99137 cifs: don't update i_size in cifs_do_truncate without a cached handle
CVE-2026-99136 dm-crypt: fix a tiny race condition in crypt_dec_pending
CVE-2026-99138 tcp: fix use-after-free in do_tcp_getsockopt(TCP_CC_INFO)
CVE-2026-99140 tracing: Fix hist trigger timestamps for buffered events
CVE-2026-99139 tcp: fix use-after-free in do_tcp_getsockopt(TCP_CONGESTION)
CVE-2026-99141 tracing: Fix crash in print_graph_function_event()
CVE-2026-99142 tracing: Check operator stack capacity before pushing
CVE-2026-99154 scsi: libiscsi: Reject a negative task index from parse_pdu_itt
CVE-2026-99151 drm/amd/display: Fix NULL sink dereference in USB4 bandwidth functions
CVE-2026-99153 scsi: libiscsi: Validate the ITT reflected in a Reject PDU
CVE-2026-99152 scsi: libiscsi: Validate the task named by a management response
CVE-2026-99150 drm/amdgpu: don't drop the runtime PM reference twice in amdgpu_gpr

Showing top 20 of 117 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux