CVE-2026-97481 (GCVE-0-2026-97481)
Vulnerability from cvelistv5
Published
2026-09-24 16:04
Modified
2026-10-03 10:58
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: serial: 8250: fix possible ISR soft lockup There are rare cases in which the host gets stuck in the ISR because it is flooded with messages during the startup phase. The reason for the soft lockup in the ISR is the missing FIFO error IRQ (FIFOE) handling. Not handling it and reporting IRQ_HANDLED triggers the IRQ immediately again. Fix this by adding a check for the FIFOE status and clearing the FIFO if no data is ready (DR). This behavior was observed on an AM62L device which uses the OMAP 8250 driver. Fix it for all 8250 drivers, since the OMAP driver's special IRQ setup handling may trigger this behavior more frequently, but it is not ensured that other 8250 drivers aren't affected.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "drivers/tty/serial/8250/8250_port.c"
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250: fix possible ISR soft lockup\n\nThere are rare cases in which the host gets stuck in the ISR because it\nis flooded with messages during the startup phase.\n\nThe reason for the soft lockup in the ISR is the missing FIFO error IRQ\n(FIFOE) handling. Not handling it and reporting IRQ_HANDLED triggers\nthe IRQ immediately again.\n\nFix this by adding a check for the FIFOE status and clearing the FIFO\nif no data is ready (DR).\n\nThis behavior was observed on an AM62L device which uses the OMAP 8250\ndriver. Fix it for all 8250 drivers, since the OMAP driver\u0027s special\nIRQ setup handling may trigger this behavior more frequently, but it\nis not ensured that other 8250 drivers aren\u0027t affected."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:58:45.270Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4bce4a6f6318035d77d6b6199527b1950bb015f4"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b67af8cd90542b2607623e3282811849e191b79"
        },
        {
          "url": "https://git.kernel.org/stable/c/95d0b40c0623fd2b58c753f8dd6adda7263e3cd1"
        },
        {
          "url": "https://git.kernel.org/stable/c/03ed804a0ddc3d069faf94c47f9e702afe5ca084"
        },
        {
          "url": "https://git.kernel.org/stable/c/2881b2e6da02daea1eb8254247ba8fd20c9d3348"
        },
        {
          "url": "https://git.kernel.org/stable/c/4295c58990b7a84e8349a2226db692e252825b60"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c6bf45e5a345cc3b9ffbeaf9083ecac3c2293eb"
        }
      ],
      "title": "serial: 8250: fix possible ISR soft lockup",
      "x_generator": {
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      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97481",
    "datePublished": "2026-09-24T16:04:23.958Z",
    "dateReserved": "2026-09-24T16:01:01.149Z",
    "dateUpdated": "2026-10-03T10:58:45.270Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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