{"id":"CVE-2026-98883","state":"PUBLISHED","title":"serial: 8250_port: recognize UPIO_AU","description":"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[<80521d40>] set_io_from_upio+0xfc/0x124\n[<80521dfc>] serial8250_set_defaults+0x94/0xe0\n[<80520fb4>] serial8250_register_8250_port+0x288/0x51c\n[<805214ec>] serial8250_probe+0x160/0x1e8\n[<8053b5f0>] 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.","publishedAt":"2026-10-23T11:37:38.372Z","updatedAt":"2026-10-26T06:56:06.942Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7c7e6c8924e7bf98db4e5b2edb202842003c00c2","status":"affected","lessThan":"9f67997353caa29c6a080789a1fb6e01fb50c118","versionType":"git"},{"version":"7c7e6c8924e7bf98db4e5b2edb202842003c00c2","status":"affected","lessThan":"49fa670efdfdd27e29145cbd2beef065c08717ef","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/serial/8250/8250_port.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/serial/8250/8250_port.c"]}],"references":["https://git.kernel.org/stable/c/9f67997353caa29c6a080789a1fb6e01fb50c118","https://git.kernel.org/stable/c/49fa670efdfdd27e29145cbd2beef065c08717ef"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98883.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98883","state":"PUBLISHED","datePublished":"2026-10-23T11:37:38.372Z","dateUpdated":"2026-10-26T06:56:06.942Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.378Z"},"containers":{"cna":{"title":"serial: 8250_port: recognize UPIO_AU","descriptions":[{"lang":"en","value":"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[<80521d40>] set_io_from_upio+0xfc/0x124\n[<80521dfc>] serial8250_set_defaults+0x94/0xe0\n[<80520fb4>] serial8250_register_8250_port+0x288/0x51c\n[<805214ec>] serial8250_probe+0x160/0x1e8\n[<8053b5f0>] 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7c7e6c8924e7bf98db4e5b2edb202842003c00c2","status":"affected","lessThan":"9f67997353caa29c6a080789a1fb6e01fb50c118","versionType":"git"},{"version":"7c7e6c8924e7bf98db4e5b2edb202842003c00c2","status":"affected","lessThan":"49fa670efdfdd27e29145cbd2beef065c08717ef","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/serial/8250/8250_port.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/serial/8250/8250_port.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9f67997353caa29c6a080789a1fb6e01fb50c118"},{"url":"https://git.kernel.org/stable/c/49fa670efdfdd27e29145cbd2beef065c08717ef"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-26T06:56:06.942Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}