Bug 2451186 (CVE-2026-23291)

Summary: CVE-2026-23291 kernel: nfc: pn533: properly drop the usb interface reference on disconnect
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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OS: Linux   
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A flaw was found in the Linux kernel's `nfc: pn533` driver. When a device is disconnected, a reference count on the USB interface is not properly dropped, leading to a dangling reference. This resource management issue may lead to system instability or a denial of service (DoS).
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Description OSIDB Bzimport 2026-03-25 11:03:31 UTC 
In the Linux kernel, the following vulnerability has been resolved:

nfc: pn533: properly drop the usb interface reference on disconnect

When the device is disconnected from the driver, there is a "dangling"
reference count on the usb interface that was grabbed in the probe
callback.  Fix this up by properly dropping the reference after we are
done with it.
Comment 1 Alexander B 2026-03-25 17:29:09 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026032525-CVE-2026-23291-eae3@gregkh/T