CVE-2026-23041 (GCVE-0-2026-23041)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:00 – Updated: 2026-02-09 08:37
VLAI?
Title
bnxt_en: Fix NULL pointer crash in bnxt_ptp_enable during error cleanup
Summary
In the Linux kernel, the following vulnerability has been resolved: bnxt_en: Fix NULL pointer crash in bnxt_ptp_enable during error cleanup When bnxt_init_one() fails during initialization (e.g., bnxt_init_int_mode returns -ENODEV), the error path calls bnxt_free_hwrm_resources() which destroys the DMA pool and sets bp->hwrm_dma_pool to NULL. Subsequently, bnxt_ptp_clear() is called, which invokes ptp_clock_unregister(). Since commit a60fc3294a37 ("ptp: rework ptp_clock_unregister() to disable events"), ptp_clock_unregister() now calls ptp_disable_all_events(), which in turn invokes the driver's .enable() callback (bnxt_ptp_enable()) to disable PTP events before completing the unregistration. bnxt_ptp_enable() attempts to send HWRM commands via bnxt_ptp_cfg_pin() and bnxt_ptp_cfg_event(), both of which call hwrm_req_init(). This function tries to allocate from bp->hwrm_dma_pool, causing a NULL pointer dereference: bnxt_en 0000:01:00.0 (unnamed net_device) (uninitialized): bnxt_init_int_mode err: ffffffed KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] Call Trace: __hwrm_req_init (drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c:72) bnxt_ptp_enable (drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:323 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:517) ptp_disable_all_events (drivers/ptp/ptp_chardev.c:66) ptp_clock_unregister (drivers/ptp/ptp_clock.c:518) bnxt_ptp_clear (drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:1134) bnxt_init_one (drivers/net/ethernet/broadcom/bnxt/bnxt.c:16889) Lines are against commit f8f9c1f4d0c7 ("Linux 6.19-rc3") Fix this by clearing and unregistering ptp (bnxt_ptp_clear()) before freeing HWRM resources.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a60fc3294a377204664b5484e4a487fa124155da , < 0174d5466caefc22f03a36c43b2a3cce7e332627 (git)
Affected: a60fc3294a377204664b5484e4a487fa124155da , < 3358995b1a7f9dcb52a56ec8251570d71024dad0 (git)
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    Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/broadcom/bnxt/bnxt.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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          "vendor": "Linux",
          "versions": [
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              "version": "6.18"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.6",
              "versionType": "semver"
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              "lessThanOrEqual": "*",
              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.6",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.18",
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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\nbnxt_en: Fix NULL pointer crash in bnxt_ptp_enable during error cleanup\n\nWhen bnxt_init_one() fails during initialization (e.g.,\nbnxt_init_int_mode returns -ENODEV), the error path calls\nbnxt_free_hwrm_resources() which destroys the DMA pool and sets\nbp-\u003ehwrm_dma_pool to NULL. Subsequently, bnxt_ptp_clear() is called,\nwhich invokes ptp_clock_unregister().\n\nSince commit a60fc3294a37 (\"ptp: rework ptp_clock_unregister() to\ndisable events\"), ptp_clock_unregister() now calls\nptp_disable_all_events(), which in turn invokes the driver\u0027s .enable()\ncallback (bnxt_ptp_enable()) to disable PTP events before completing the\nunregistration.\n\nbnxt_ptp_enable() attempts to send HWRM commands via bnxt_ptp_cfg_pin()\nand bnxt_ptp_cfg_event(), both of which call hwrm_req_init(). This\nfunction tries to allocate from bp-\u003ehwrm_dma_pool, causing a NULL\npointer dereference:\n\n  bnxt_en 0000:01:00.0 (unnamed net_device) (uninitialized): bnxt_init_int_mode err: ffffffed\n  KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]\n  Call Trace:\n   __hwrm_req_init (drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c:72)\n   bnxt_ptp_enable (drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:323 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:517)\n   ptp_disable_all_events (drivers/ptp/ptp_chardev.c:66)\n   ptp_clock_unregister (drivers/ptp/ptp_clock.c:518)\n   bnxt_ptp_clear (drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:1134)\n   bnxt_init_one (drivers/net/ethernet/broadcom/bnxt/bnxt.c:16889)\n\nLines are against commit f8f9c1f4d0c7 (\"Linux 6.19-rc3\")\n\nFix this by clearing and unregistering ptp (bnxt_ptp_clear()) before\nfreeing HWRM resources."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:37:36.153Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0174d5466caefc22f03a36c43b2a3cce7e332627"
        },
        {
          "url": "https://git.kernel.org/stable/c/3358995b1a7f9dcb52a56ec8251570d71024dad0"
        }
      ],
      "title": "bnxt_en: Fix NULL pointer crash in bnxt_ptp_enable during error cleanup",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23041",
    "datePublished": "2026-02-04T16:00:24.710Z",
    "dateReserved": "2026-01-13T15:37:45.944Z",
    "dateUpdated": "2026-02-09T08:37:36.153Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23041\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-04T16:16:19.563\",\"lastModified\":\"2026-02-04T16:33:44.537\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbnxt_en: Fix NULL pointer crash in bnxt_ptp_enable during error cleanup\\n\\nWhen bnxt_init_one() fails during initialization (e.g.,\\nbnxt_init_int_mode returns -ENODEV), the error path calls\\nbnxt_free_hwrm_resources() which destroys the DMA pool and sets\\nbp-\u003ehwrm_dma_pool to NULL. Subsequently, bnxt_ptp_clear() is called,\\nwhich invokes ptp_clock_unregister().\\n\\nSince commit a60fc3294a37 (\\\"ptp: rework ptp_clock_unregister() to\\ndisable events\\\"), ptp_clock_unregister() now calls\\nptp_disable_all_events(), which in turn invokes the driver\u0027s .enable()\\ncallback (bnxt_ptp_enable()) to disable PTP events before completing the\\nunregistration.\\n\\nbnxt_ptp_enable() attempts to send HWRM commands via bnxt_ptp_cfg_pin()\\nand bnxt_ptp_cfg_event(), both of which call hwrm_req_init(). This\\nfunction tries to allocate from bp-\u003ehwrm_dma_pool, causing a NULL\\npointer dereference:\\n\\n  bnxt_en 0000:01:00.0 (unnamed net_device) (uninitialized): bnxt_init_int_mode err: ffffffed\\n  KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]\\n  Call Trace:\\n   __hwrm_req_init (drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c:72)\\n   bnxt_ptp_enable (drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:323 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:517)\\n   ptp_disable_all_events (drivers/ptp/ptp_chardev.c:66)\\n   ptp_clock_unregister (drivers/ptp/ptp_clock.c:518)\\n   bnxt_ptp_clear (drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:1134)\\n   bnxt_init_one (drivers/net/ethernet/broadcom/bnxt/bnxt.c:16889)\\n\\nLines are against commit f8f9c1f4d0c7 (\\\"Linux 6.19-rc3\\\")\\n\\nFix this by clearing and unregistering ptp (bnxt_ptp_clear()) before\\nfreeing HWRM resources.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0174d5466caefc22f03a36c43b2a3cce7e332627\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3358995b1a7f9dcb52a56ec8251570d71024dad0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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