CVE-2026-98883

Unknown

Description

In the Linux kernel, the following vulnerability has been resolved: serial: 8250_port: recognize UPIO_AU My MIPS Alchemy systems generate the following warning during probe of the 8250 driver: WARNING: drivers/tty/serial/8250/8250_port.c:462 at set_io_from_upio+0xfc/0x124, CPU#0: swapper/0/1 Unsupported UART type 4 [...] [<80521d40>] set_io_from_upio+0xfc/0x124 [<80521dfc>] serial8250_set_defaults+0x94/0xe0 [<80520fb4>] serial8250_register_8250_port+0x288/0x51c [<805214ec>] serial8250_probe+0x160/0x1e8 [<8053b5f0>] platform_probe+0x64/0x90 The least invasive fix is to recognize UPIO_AU (type 4) in set_io_from_upio() and do nothing, since all parameters have already been set up in 8250_rt288x.c::au_platform_setup(). Run-tested on Alchemy Au1300 platform.

SeverityUnknown

CVSS—

Exploit probability—

Product

Linux

PublishedOct 23, 2026

First seenOct 23, 2026

How to fix

Update

Linux Linux9f67997353caa29c6a080789a1fb6e01fb50c118, 49fa670efdfdd27e29145cbd2beef065c08717ef or later

Affected products

Product	Affected versions	Fixed in
Linux Linux	7c7e6c8924e7bf98db4e5b2edb202842003c00c2 ≤ v < 9f67997353caa29c6a080789a1fb6e01fb50c118, 7c7e6c8924e7bf98db4e5b2edb202842003c00c2 ≤ v < 49fa670efdfdd27e29145cbd2beef065c08717ef, 6.13	9f67997353caa29c6a080789a1fb6e01fb50c118, 49fa670efdfdd27e29145cbd2beef065c08717ef

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