CVE-2026-98210 (GCVE-0-2026-98210)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:44 – Updated: 2026-10-06 08:44
VLAI
Title
mmc: mxcmmc: cancel data work and watchdog on remove
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f6ad0a481342223b2e7ae9f55b154e14f1391ada , < 740f595f8ad678cb4d79f13edd12851df2492bdd (git)
Affected: f6ad0a481342223b2e7ae9f55b154e14f1391ada , < d3641afe6ee76d852834a34ef0669eefced32752 (git)
Affected: f6ad0a481342223b2e7ae9f55b154e14f1391ada , < 314966b490323bdcfd3162a1398b00e587e0ced4 (git)
Affected: f6ad0a481342223b2e7ae9f55b154e14f1391ada , < ae10838a7cdf0e54caa9d0a4f488704fd04e7f01 (git)
Affected: f6ad0a481342223b2e7ae9f55b154e14f1391ada , < a1ff367e0dc961d73707add508a95df5c3509bd1 (git)
Affected: f6ad0a481342223b2e7ae9f55b154e14f1391ada , < 23383e0578b58ba2dc0730cf9f7806bd66bf859a (git)
Affected: f6ad0a481342223b2e7ae9f55b154e14f1391ada , < e2948c4232209e87c861a680f20f1e3cf8a57fec (git)
Affected: f6ad0a481342223b2e7ae9f55b154e14f1391ada , < d3a421c82412344022982d5b91ba23194a0a6f29 (git)
Create a notification for this product.
Linux Linux Affected: 3.7
Unaffected: 0 , < 3.7 (semver)
Unaffected: 5.10.271 , ≤ 5.10.* (semver)
Unaffected: 5.15.222 , ≤ 5.15.* (semver)
Unaffected: 6.1.189 , ≤ 6.1.* (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.54 , ≤ 6.18.* (semver)
Unaffected: 7.2.8 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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          "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."
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    "datePublished": "2026-10-06T08:44:46.788Z",
    "dateReserved": "2026-09-25T10:25:14.325Z",
    "dateUpdated": "2026-10-06T08:44:46.788Z",
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            "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."
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-09T09:31:05+00:00",
      "cve": "CVE-2026-98210",
      "id": "CVE-2026-98210",
      "initial_release_date": "2026-10-06T00:00:00+00:00",
      "product_status:known_not_affected": "277",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mmc: mxcmmc: cancel data work and watchdog on remove",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98210.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-08T16:50:30Z",
      "cve": "CVE-2026-98210",
      "id": "CVE-2026-98210",
      "initial_release_date": "2026-10-08T16:50:30Z",
      "product_status:known_affected": "297",
      "product_status:known_not_affected": "50",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-98210",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-98210.json",
      "version": "2"
    }
  }
}



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