Bug 2536371 (CVE-2026-92482)

Summary: CVE-2026-92482 kernel: pinctrl: mediatek: use devm_gpiochip_add_data() for GPIO chip
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's pinctrl Mediatek driver. This vulnerability occurs because the `gpio_chip` memory is freed prematurely while it is still registered, leading to a use-after-free condition. This can happen when the driver is built as a module and then unloaded. A local attacker could potentially exploit this to cause a denial of service or achieve arbitrary code execution.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-09-17 17:35:00 UTC 
In the Linux kernel, the following vulnerability has been resolved:

pinctrl: mediatek: use devm_gpiochip_add_data() for GPIO chip

The gpio_chip is allocated with device-managed memory but registered with
the non-managed gpiochip_add_data(). This was harmless while the drivers
were built-in, but once they can be built as modules and unbound/rmmod'd,
devm frees the gpio_chip's memory while it is still registered, causing a
use-after-free.

Register it with devm_gpiochip_add_data() so it shares the same
device-managed lifecycle, which also lets the manual gpiochip_remove()
error paths go away.
Comment 1 gkamathe 2026-09-20 12:53:47 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-92482.mbox