Bug 2516596 (CVE-2026-72062)

Summary: CVE-2026-72062 kernel: gpio: mt7621: avoid corruption of shared interrupt trigger state
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's `gpio: mt7621` module. This vulnerability arises from non-atomic operations on shared interrupt trigger state. When `mediatek_gpio_irq_type()` is called concurrently for different interrupts on the same bank, it can lead to an overwrite of configurations. This corruption of the shared interrupt trigger state could result in incorrect interrupt handling and potential system instability or a denial of service.
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Description OSIDB Bzimport 2026-08-15 06:21:00 UTC 
In the Linux kernel, the following vulnerability has been resolved:

gpio: mt7621: avoid corruption of shared interrupt trigger state

The bank-shared fields like 'rising' and 'falling' are modified using
non-atomic read-modify-write operations. Since every gpio chip instance
represents an entire bank of 32 pins, if 'mediatek_gpio_irq_type()' is
called concurrently for different IRQs on the same bank a possible overwrite
of each other's configuration is possible. Thus, protect this state with
'gpio_generic_lock_irqsave' lock in the same way it is handled in irp_chip
'mediatek_gpio_irq_mask()' and 'mediatek_gpio_irq_unmask()' callbacks.
Comment 1 Keith Grant 2026-08-17 19:17:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081517-CVE-2026-72062-799f@gregkh/T