CVE-2026-98883

UNKNOWN 0.0

serial: 8250_port: recognize UPIO_AU

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Oct 23, 2026

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Affected Versions

Linux / Linux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9f67997353caa29c6a080789a1fb6e01fb50c118 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 49fa670efdfdd27e29145cbd2beef065c08717ef 0 < 6.18.53

Linux / Linux

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

git.kernel.org: https://git.kernel.org/stable/c/9f67997353caa29c6a080789a1fb6e01fb50c118 git.kernel.org: https://git.kernel.org/stable/c/49fa670efdfdd27e29145cbd2beef065c08717ef