CVE-2026-98212 (GCVE-0-2026-98212)
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: hsq: Fix use-after-free in retry work mmc_hsq_pump_requests() queues retry_work when request_atomic() returns -EBUSY; today sdhci-sprd is the only consumer that implements request_atomic(). The work is embedded in a devm-allocated mmc_hsq, but is never cancelled during driver removal. Work still pending at unbind can therefore run after the devm allocation has been released and dereference hsq->mmc and hsq->mrq. Use devm_work_autocancel() to cancel and drain retry_work before the devm allocation is released. By the time devres cleanup begins, mmc_remove_host() has already stopped the host, so no new requests can arm the work. This issue was found by an in-house static analysis tool.
References
Impacted products
Vendor Product Version
Linux Linux Version: 6db96e5810e0a6a345b7d78549de7676ae5b2662
Version: 6db96e5810e0a6a345b7d78549de7676ae5b2662
Version: 6db96e5810e0a6a345b7d78549de7676ae5b2662
Version: 6db96e5810e0a6a345b7d78549de7676ae5b2662
Version: 6db96e5810e0a6a345b7d78549de7676ae5b2662
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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/mmc/host/mmc_hsq.c"
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          "vendor": "Linux",
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              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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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: hsq: Fix use-after-free in retry work\n\nmmc_hsq_pump_requests() queues retry_work when request_atomic() returns\n-EBUSY; today sdhci-sprd is the only consumer that implements\nrequest_atomic(). The work is embedded in a devm-allocated mmc_hsq, but\nis never cancelled during driver removal. Work still pending at unbind\ncan therefore run after the devm allocation has been released and\ndereference hsq-\u003emmc and hsq-\u003emrq.\n\nUse devm_work_autocancel() to cancel and drain retry_work before the devm\nallocation is released. By the time devres cleanup begins,\nmmc_remove_host() has already stopped the host, so no new requests can\narm the work.\n\nThis issue was found by an in-house static analysis tool."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:15:43.105Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c50d6515bffb148c2c12be6d587ec201dfab4c34"
        },
        {
          "url": "https://git.kernel.org/stable/c/df2eb59fd9eb33663dc1053f5a4ed851e0aa1f67"
        },
        {
          "url": "https://git.kernel.org/stable/c/8439bf262ce3267bcfee29d3c61605f1731a2271"
        },
        {
          "url": "https://git.kernel.org/stable/c/45341b341642c377192c95e4d48e0a859cf85f42"
        },
        {
          "url": "https://git.kernel.org/stable/c/5d132990475f02cfa1debe03d50b479432864ebd"
        }
      ],
      "title": "mmc: hsq: Fix use-after-free in retry work",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98212",
    "datePublished": "2026-10-06T08:44:48.498Z",
    "dateReserved": "2026-09-25T10:25:14.325Z",
    "dateUpdated": "2026-10-19T09:15:43.105Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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