{"id":"CVE-2026-98883","summary":"serial: 8250_port: recognize UPIO_AU","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250_port: recognize UPIO_AU\n\nMy MIPS Alchemy systems generate the following warning during\nprobe of the 8250 driver:\n\nWARNING: drivers/tty/serial/8250/8250_port.c:462 at set_io_from_upio+0xfc/0x124, CPU#0: swapper/0/1\nUnsupported UART type 4\n[...]\n[\u003c80521d40\u003e] set_io_from_upio+0xfc/0x124\n[\u003c80521dfc\u003e] serial8250_set_defaults+0x94/0xe0\n[\u003c80520fb4\u003e] serial8250_register_8250_port+0x288/0x51c\n[\u003c805214ec\u003e] serial8250_probe+0x160/0x1e8\n[\u003c8053b5f0\u003e] platform_probe+0x64/0x90\n\nThe least invasive fix is to recognize UPIO_AU (type 4) in set_io_from_upio()\nand do nothing, since all parameters have already been set up in\n8250_rt288x.c::au_platform_setup().\n\nRun-tested on Alchemy Au1300 platform.","modified":"2026-10-28T02:31:14.979265282Z","published":"2026-10-23T11:37:38.372Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98883.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/49fa670efdfdd27e29145cbd2beef065c08717ef"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9f67997353caa29c6a080789a1fb6e01fb50c118"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98883.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98883"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7c7e6c8924e7bf98db4e5b2edb202842003c00c2"},{"fixed":"9f67997353caa29c6a080789a1fb6e01fb50c118"},{"fixed":"49fa670efdfdd27e29145cbd2beef065c08717ef"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98883.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.53"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98883.json"}}],"schema_version":"1.9.2"}