CVE-2025-39810 (GCVE-0-2025-39810)
Vulnerability from cvelistv5
Published
2025-09-16 13:00
Modified
2025-09-16 13:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bnxt_en: Fix memory corruption when FW resources change during ifdown bnxt_set_dflt_rings() assumes that it is always called before any TC has been created. So it doesn't take bp->num_tc into account and assumes that it is always 0 or 1. In the FW resource or capability change scenario, the FW will return flags in bnxt_hwrm_if_change() that will cause the driver to reinitialize and call bnxt_cancel_reservations(). This will lead to bnxt_init_dflt_ring_mode() calling bnxt_set_dflt_rings() and bp->num_tc may be greater than 1. This will cause bp->tx_ring[] to be sized too small and cause memory corruption in bnxt_alloc_cp_rings(). Fix it by properly scaling the TX rings by bp->num_tc in the code paths mentioned above. Add 2 helper functions to determine bp->tx_nr_rings and bp->tx_nr_rings_per_tc.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2747328ba2714f1a7454208dbbc1dc0631990b4a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ab6a9950f152e094395d2e3967f889857daa185
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d00e98977ef519280b075d783653e2c492fffbb6
Impacted products
Vendor Product Version
Linux Linux Version: ec5d31e3c15d5233b491400133c67f78a320062c
Version: ec5d31e3c15d5233b491400133c67f78a320062c
Version: ec5d31e3c15d5233b491400133c67f78a320062c
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   Linux Linux Version: 5.4
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/broadcom/bnxt/bnxt.c"
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              "versionType": "original_commit_for_fix"
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbnxt_en: Fix memory corruption when FW resources change during ifdown\n\nbnxt_set_dflt_rings() assumes that it is always called before any TC has\nbeen created.  So it doesn\u0027t take bp-\u003enum_tc into account and assumes\nthat it is always 0 or 1.\n\nIn the FW resource or capability change scenario, the FW will return\nflags in bnxt_hwrm_if_change() that will cause the driver to\nreinitialize and call bnxt_cancel_reservations().  This will lead to\nbnxt_init_dflt_ring_mode() calling bnxt_set_dflt_rings() and bp-\u003enum_tc\nmay be greater than 1.  This will cause bp-\u003etx_ring[] to be sized too\nsmall and cause memory corruption in bnxt_alloc_cp_rings().\n\nFix it by properly scaling the TX rings by bp-\u003enum_tc in the code\npaths mentioned above.  Add 2 helper functions to determine\nbp-\u003etx_nr_rings and bp-\u003etx_nr_rings_per_tc."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-16T13:00:12.677Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/2747328ba2714f1a7454208dbbc1dc0631990b4a"
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      ],
      "title": "bnxt_en: Fix memory corruption when FW resources change during ifdown",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39810",
    "datePublished": "2025-09-16T13:00:12.677Z",
    "dateReserved": "2025-04-16T07:20:57.137Z",
    "dateUpdated": "2025-09-16T13:00:12.677Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-39810\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-16T13:15:53.543\",\"lastModified\":\"2025-09-18T13:43:34.310\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbnxt_en: Fix memory corruption when FW resources change during ifdown\\n\\nbnxt_set_dflt_rings() assumes that it is always called before any TC has\\nbeen created.  So it doesn\u0027t take bp-\u003enum_tc into account and assumes\\nthat it is always 0 or 1.\\n\\nIn the FW resource or capability change scenario, the FW will return\\nflags in bnxt_hwrm_if_change() that will cause the driver to\\nreinitialize and call bnxt_cancel_reservations().  This will lead to\\nbnxt_init_dflt_ring_mode() calling bnxt_set_dflt_rings() and bp-\u003enum_tc\\nmay be greater than 1.  This will cause bp-\u003etx_ring[] to be sized too\\nsmall and cause memory corruption in bnxt_alloc_cp_rings().\\n\\nFix it by properly scaling the TX rings by bp-\u003enum_tc in the code\\npaths mentioned above.  Add 2 helper functions to determine\\nbp-\u003etx_nr_rings and bp-\u003etx_nr_rings_per_tc.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2747328ba2714f1a7454208dbbc1dc0631990b4a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9ab6a9950f152e094395d2e3967f889857daa185\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d00e98977ef519280b075d783653e2c492fffbb6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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