CVE-2026-98210 (GCVE-0-2026-98210)
Vulnerability from cvelistv5
Published
2026-10-06 08:44
Modified
2026-10-19 09:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mmc: mxcmmc: cancel data work and watchdog on remove mxcmci_remove() frees the host through the devm tail, but neither it nor mmc_remove_host() drains the driver's own asynchronous state. host->watchdog, a 10 s timer armed on the DMA path in mxcmci_setup_data(), is deleted only by the DMA- and IRQ-complete paths, which the remove path does not explicitly drain; it can therefore fire after the host is freed and dereference it in mxcmci_watchdog(). host->datawork, armed from the IRQ handler on the PIO path, is not cancelled by the remove path either. Free the devm-registered IRQ, then cancel datawork and delete the watchdog in mxcmci_remove(), before dma_release_channel(). Freeing the IRQ first keeps a trailing handler from re-arming datawork between the cancel and the host free. Both callbacks are non-self-rearming. This issue was found by an in-house static analysis tool.
References
Impacted products
Vendor Product Version
Linux Linux Version: f6ad0a481342223b2e7ae9f55b154e14f1391ada
Version: f6ad0a481342223b2e7ae9f55b154e14f1391ada
Version: f6ad0a481342223b2e7ae9f55b154e14f1391ada
Version: f6ad0a481342223b2e7ae9f55b154e14f1391ada
Version: f6ad0a481342223b2e7ae9f55b154e14f1391ada
Version: f6ad0a481342223b2e7ae9f55b154e14f1391ada
Version: f6ad0a481342223b2e7ae9f55b154e14f1391ada
Version: f6ad0a481342223b2e7ae9f55b154e14f1391ada
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{
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          "programFiles": [
            "drivers/mmc/host/mxcmmc.c"
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              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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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\nmmc: mxcmmc: cancel data work and watchdog on remove\n\nmxcmci_remove() frees the host through the devm tail, but neither it nor\nmmc_remove_host() drains the driver\u0027s own asynchronous state.\nhost-\u003ewatchdog, a 10 s timer armed on the DMA path in mxcmci_setup_data(),\nis deleted only by the DMA- and IRQ-complete paths, which the remove path\ndoes not explicitly drain; it can therefore fire after the host is freed\nand dereference it in mxcmci_watchdog().  host-\u003edatawork, armed from the\nIRQ handler on the PIO path, is not cancelled by the remove path either.\n\nFree the devm-registered IRQ, then cancel datawork and delete the watchdog\nin mxcmci_remove(), before dma_release_channel().  Freeing the IRQ first\nkeeps a trailing handler from re-arming datawork between the cancel and\nthe host free.  Both callbacks are non-self-rearming.\n\nThis issue was found by an in-house static analysis tool."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:15:41.186Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/740f595f8ad678cb4d79f13edd12851df2492bdd"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3641afe6ee76d852834a34ef0669eefced32752"
        },
        {
          "url": "https://git.kernel.org/stable/c/314966b490323bdcfd3162a1398b00e587e0ced4"
        },
        {
          "url": "https://git.kernel.org/stable/c/ae10838a7cdf0e54caa9d0a4f488704fd04e7f01"
        },
        {
          "url": "https://git.kernel.org/stable/c/a1ff367e0dc961d73707add508a95df5c3509bd1"
        },
        {
          "url": "https://git.kernel.org/stable/c/23383e0578b58ba2dc0730cf9f7806bd66bf859a"
        },
        {
          "url": "https://git.kernel.org/stable/c/e2948c4232209e87c861a680f20f1e3cf8a57fec"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3a421c82412344022982d5b91ba23194a0a6f29"
        }
      ],
      "title": "mmc: mxcmmc: cancel data work and watchdog on remove",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98210",
    "datePublished": "2026-10-06T08:44:46.788Z",
    "dateReserved": "2026-09-25T10:25:14.325Z",
    "dateUpdated": "2026-10-19T09:15:41.186Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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