CVE-2026-98957 (GCVE-0-2026-98957)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:19 – Updated: 2026-10-23 12:19
VLAI
Title
wifi: mt76: mt7915: disable rx napi when removing device
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7915: disable rx napi when removing device Unloading the mt7915e module with a MT7916 triggers multiples WARN in __netif_napi_del_locked() and in page_pool_disable_direct_recycling() because the driver does not disable the napi before destroying it. This is troublesome since on MT7916 it is required to unload the module and reinsert it with a different enable_6ghz parameter to change the frequency. The system generally becomes unstable after reinserting the module. Fix it by disabling rx napi inside mt7915e itself, even through napi rx is enabled in the mt76 generic code. Disabling it in the mt76 generic code was previously attempted and reverted because napi was disabled too late and rx handlers could access freed structures. Note that the tx side is enabled and disabled by the mt76 generic code. It is disabled in mt7915_stop_hardware() since, unlike mt7915_unregister_device(), is it also called in the probe path if an error happens after rx napi is enabled.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7064 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e57b7901469fc0b021930b83a8094baaf3d81b09 , < 0281dac1e213329b053fb02e612de7f1477a52d7 (git)
Affected: e57b7901469fc0b021930b83a8094baaf3d81b09 , < 0f9afe238eeb79829f0f92f376ba3a20781caccd (git)
Affected: e57b7901469fc0b021930b83a8094baaf3d81b09 , < 7199ee4b47de0b61fa6455a1587c5ab645ebe262 (git)
Affected: e57b7901469fc0b021930b83a8094baaf3d81b09 , < 916c484d29d82f45c281da2786fcd6a1284430ce (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.57 , ≤ 6.18.* (semver)
Unaffected: 7.2.11 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7915/init.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7915: disable rx napi when removing device\n\nUnloading the mt7915e module with a MT7916 triggers multiples WARN in\n__netif_napi_del_locked() and in page_pool_disable_direct_recycling()\nbecause the driver does not disable the napi before destroying it.\n\nThis is troublesome since on MT7916 it is required to unload the module\nand reinsert it with a different enable_6ghz parameter to change the\nfrequency.  The system generally becomes unstable after reinserting the\nmodule.\n\nFix it by disabling rx napi inside mt7915e itself, even through napi rx is\nenabled in the mt76 generic code.  Disabling it in the mt76 generic code\nwas previously attempted and reverted because napi was disabled too\nlate and rx handlers could access freed structures.  Note that the tx\nside is enabled and disabled by the mt76 generic code.\n\nIt is disabled in mt7915_stop_hardware() since, unlike\nmt7915_unregister_device(), is it also called in the probe path if an\nerror happens after rx napi is enabled."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T12:19:22.400Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98957",
    "datePublished": "2026-10-23T12:19:22.400Z",
    "dateReserved": "2026-09-25T10:25:14.382Z",
    "dateUpdated": "2026-10-23T12:19:22.400Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-10-26",
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      "percentile": "0.07065"
    },
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      "cve": "CVE-2026-98957",
      "id": "msrc_CVE-2026-98957",
      "initial_release_date": "2026-10-24T01:09:45.000Z",
      "product_status:known_affected": "1",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "wifi: mt76: mt7915: disable rx napi when removing device",
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                ],
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7915: disable rx napi when removing device\n\nUnloading the mt7915e module with a MT7916 triggers multiples WARN in\n__netif_napi_del_locked() and in page_pool_disable_direct_recycling()\nbecause the driver does not disable the napi before destroying it.\n\nThis is troublesome since on MT7916 it is required to unload the module\nand reinsert it with a different enable_6ghz parameter to change the\nfrequency.  The system generally becomes unstable after reinserting the\nmodule.\n\nFix it by disabling rx napi inside mt7915e itself, even through napi rx is\nenabled in the mt76 generic code.  Disabling it in the mt76 generic code\nwas previously attempted and reverted because napi was disabled too\nlate and rx handlers could access freed structures.  Note that the tx\nside is enabled and disabled by the mt76 generic code.\n\nIt is disabled in mt7915_stop_hardware() since, unlike\nmt7915_unregister_device(), is it also called in the probe path if an\nerror happens after rx napi is enabled."
          }
        ],
        "id": "CVE-2026-98957",
        "lastModified": "2026-10-23T13:17:17.007",
        "metrics": {},
        "published": "2026-10-23T13:17:17.007",
        "references": [
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
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    }
  }
}



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