Riskcovery

CVE-2026-98883

serial: 8250_port: recognize UPIO_AU

State
Published
Severity
Not scored
Published
Oct 23, 2026
Updated
Oct 26, 2026
Reserved
Sep 25, 2026

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 7c7e6c8924e7bf98db4e5b2edb202842003c00c2 to before 9f67997353caa29c6a080789a1fb6e01fb50c118Affected
  • 7c7e6c8924e7bf98db4e5b2edb202842003c00c2 to before 49fa670efdfdd27e29145cbd2beef065c08717efAffected
LinuxLinux
  • 6.13Affected
  • before 6.13Not affected
  • 6.18.53 through 6.18.*Not affected
  • 7.2 and laterNot affected

References

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