CVE-2026-53384
In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails dw8250_probe() registers the 8250 port via serial8250_register_8250_port() and then, if the device has a clock, registers a clock notifier. If clk_notifier_register() fails, probe returns the error but leaves the 8250 port registered. The matching serial8250_unregister_port() lives in dw8250_remove(), which is not called when probe fails, so the port slot stays occupied until the device is rebound or the system is rebooted. The devm-allocated driver data is freed while the port still references it (via the saved private_data and serial_in/serial_out callbacks), so any access to that port slot before a rebind is a use-after-free hazard. Unregister the port on the clk_notifier_register() error path.
Affected versions
Linux kernel versions
5.9
and later are affected. Fixed in
6.1.177,
6.6.144,
6.12.95,
6.18.38,
7.0.14,
7.1.2,
7.2-rc1
and their respective stable series.
References
7 totalFrequently asked questions
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What is CVE-2026-53384?
CVE-2026-53384 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.9 onward and has been patched in 6.1.177, 6.6.144, 6.12.95 and others. CVE-2026-53384 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-53384?
Yes — CVE-2026-53384 has been patched. Fixed versions include 6.1.177, 6.6.144, 6.12.95 and others. If you are running Linux kernel 5.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-53384 actively exploited?
No — CVE-2026-53384 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.