Bug 2395795 (CVE-2025-39808)

Summary: CVE-2025-39808 kernel: HID: hid-ntrig: fix unable to handle page fault in ntrig_report_version()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-09-16 14:02:59 UTC 
In the Linux kernel, the following vulnerability has been resolved:

HID: hid-ntrig: fix unable to handle page fault in ntrig_report_version()

in ntrig_report_version(), hdev parameter passed from hid_probe().
sending descriptor to /dev/uhid can make hdev->dev.parent->parent to null
if hdev->dev.parent->parent is null, usb_dev has
invalid address(0xffffffffffffff58) that hid_to_usb_dev(hdev) returned
when usb_rcvctrlpipe() use usb_dev,it trigger
page fault error for address(0xffffffffffffff58)

add null check logic to ntrig_report_version()
before calling hid_to_usb_dev()
Comment 1 Keith Grant 2025-09-16 15:21:30 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091613-CVE-2025-39808-a964@gregkh/T