CVE-2026-98883 (GCVE-0-2026-98883)

Vulnerability from cvelistv5 – Published: 2026-10-23 11:37 – Updated: 2026-10-23 11:37
VLAI
Title
serial: 8250_port: recognize UPIO_AU
Summary
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7061 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9f67997353caa29c6a080789a1fb6e01fb50c118 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 49fa670efdfdd27e29145cbd2beef065c08717ef (git)
Affected: 0 , < 6.18.53 (semver)
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Linux Linux Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/tty/serial/8250/8250_port.c"
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          "vendor": "Linux",
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              "status": "affected",
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              "versionType": "git"
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            {
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            }
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionEndExcluding": "7.2",
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              "negate": false,
              "operator": "OR"
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      "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[\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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T11:37:38.372Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9f67997353caa29c6a080789a1fb6e01fb50c118"
        },
        {
          "url": "https://git.kernel.org/stable/c/49fa670efdfdd27e29145cbd2beef065c08717ef"
        }
      ],
      "title": "serial: 8250_port: recognize UPIO_AU",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98883",
    "datePublished": "2026-10-23T11:37:38.372Z",
    "dateReserved": "2026-09-25T10:25:14.378Z",
    "dateUpdated": "2026-10-23T11:37:38.372Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "current_release_date": "2026-10-24T01:05:08.000Z",
      "cve": "CVE-2026-98883",
      "id": "msrc_CVE-2026-98883",
      "initial_release_date": "2026-10-24T01:01:57.000Z",
      "product_status:known_affected": "1",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "serial: 8250_port: recognize UPIO_AU",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98883.json",
      "version": "2"
    },
    "nvd": {
      "cve": {
        "affected": [
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                "product": "Linux",
                "programFiles": [
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                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                    "versionType": "git"
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                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
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              {
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                "product": "Linux",
                "programFiles": [
                  "drivers/tty/serial/8250/8250_port.c"
                ],
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                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "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[\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."
          }
        ],
        "id": "CVE-2026-98883",
        "lastModified": "2026-10-23T12:18:21.970",
        "metrics": {},
        "published": "2026-10-23T12:18:21.970",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/49fa670efdfdd27e29145cbd2beef065c08717ef"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/9f67997353caa29c6a080789a1fb6e01fb50c118"
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        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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