CVE-2026-98496 (GCVE-0-2026-98496)
Vulnerability from cvelistv5
Published
2026-10-18 15:16
Modified
2026-10-19 09:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: airoha: npu: cancel wdt_work after releasing the WDT IRQ airoha_npu_remove() calls cancel_work_sync() on each core's wdt_work, but the watchdog IRQ that queues it is requested with devm_request_irq() and is freed only after .remove() returns. airoha_npu_wdt_handler() can therefore schedule_work() again once the cancel has returned. struct airoha_npu, which contains the work, is devm_kzalloc()'d and is freed in that same unwind, so the late work dereferences freed memory. Register the work with devm_work_autocancel() before devm_request_irq() and drop .remove(). Devres runs in reverse order, so the IRQ is freed before cancel_work_sync(), including when probe fails. A cancel left in .remove() cannot get that order. Initializing the work first also stops a pending watchdog interrupt from queuing an uninitialized work item. Probe currently calls INIT_WORK() only after devm_request_irq(). This issue was identified during our ongoing static-analysis research while reviewing kernel code.
Impacted products
Vendor Product Version
Linux Linux Version: 23290c7bc190def4e1ca61610992d9b7c32e33f3
Version: 23290c7bc190def4e1ca61610992d9b7c32e33f3
Version: 23290c7bc190def4e1ca61610992d9b7c32e33f3
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/airoha/airoha_npu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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        {
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          "programFiles": [
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          ],
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "6.15"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "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\nnet: airoha: npu: cancel wdt_work after releasing the WDT IRQ\n\nairoha_npu_remove() calls cancel_work_sync() on each core\u0027s wdt_work,\nbut the watchdog IRQ that queues it is requested with devm_request_irq()\nand is freed only after .remove() returns.  airoha_npu_wdt_handler() can\ntherefore schedule_work() again once the cancel has returned.  struct\nairoha_npu, which contains the work, is devm_kzalloc()\u0027d and is freed in\nthat same unwind, so the late work dereferences freed memory.\n\nRegister the work with devm_work_autocancel() before devm_request_irq()\nand drop .remove().  Devres runs in reverse order, so the IRQ is freed\nbefore cancel_work_sync(), including when probe fails.  A cancel left in\n.remove() cannot get that order.  Initializing the work first also stops\na pending watchdog interrupt from queuing an uninitialized work item.\nProbe currently calls INIT_WORK() only after devm_request_irq().\n\nThis issue was identified during our ongoing static-analysis research\nwhile reviewing kernel code."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:20:33.996Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/aca91d8fa0ecbc990ebf9a688c684dda78a43c00"
        },
        {
          "url": "https://git.kernel.org/stable/c/da9d42531f3a6dfea2e9c775b62a46185dbf280a"
        },
        {
          "url": "https://git.kernel.org/stable/c/4bdee8060d1e4581624e68fbd369b1afb14df4bc"
        }
      ],
      "title": "net: airoha: npu: cancel wdt_work after releasing the WDT IRQ",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98496",
    "datePublished": "2026-10-18T15:16:27.545Z",
    "dateReserved": "2026-09-25T10:25:14.353Z",
    "dateUpdated": "2026-10-19T09:20:33.996Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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