CVE-2026-43013 (GCVE-0-2026-43013)
Vulnerability from cvelistv5
Published
2026-05-01 14:15
Modified
2026-05-01 14:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: lag: Check for LAG device before creating debugfs __mlx5_lag_dev_add_mdev() may return 0 (success) even when an error occurs that is handled gracefully. Consequently, the initialization flow proceeds to call mlx5_ldev_add_debugfs() even when there is no valid LAG context. mlx5_ldev_add_debugfs() blindly created the debugfs directory and attributes. This exposed interfaces (like the members file) that rely on a valid ldev pointer, leading to potential NULL pointer dereferences if accessed when ldev is NULL. Add a check to verify that mlx5_lag_dev(dev) returns a valid pointer before attempting to create the debugfs entries.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7f46a0b7327ae261f9981888708dbca22c283900
Version: 7f46a0b7327ae261f9981888708dbca22c283900
Version: 7f46a0b7327ae261f9981888708dbca22c283900
Version: 7f46a0b7327ae261f9981888708dbca22c283900
Version: 7f46a0b7327ae261f9981888708dbca22c283900
Version: 7f46a0b7327ae261f9981888708dbca22c283900
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{
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          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/lag/debugfs.c"
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: lag: Check for LAG device before creating debugfs\n\n__mlx5_lag_dev_add_mdev() may return 0 (success) even when an error\noccurs that is handled gracefully. Consequently, the initialization\nflow proceeds to call mlx5_ldev_add_debugfs() even when there is no\nvalid LAG context.\n\nmlx5_ldev_add_debugfs() blindly created the debugfs directory and\nattributes. This exposed interfaces (like the members file) that rely on\na valid ldev pointer, leading to potential NULL pointer dereferences if\naccessed when ldev is NULL.\n\nAdd a check to verify that mlx5_lag_dev(dev) returns a valid pointer\nbefore attempting to create the debugfs entries."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-01T14:15:18.907Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a3db46d5f4df92630a96f7bc77b60e75c2353e06"
        },
        {
          "url": "https://git.kernel.org/stable/c/7129632cab3e4d23510b21930aa73b8d97a859f5"
        },
        {
          "url": "https://git.kernel.org/stable/c/cfa774e6c920c81e700327bf10db8cb50d5db456"
        },
        {
          "url": "https://git.kernel.org/stable/c/c53cf44588a93000f71817a6bb87a66353c48dee"
        },
        {
          "url": "https://git.kernel.org/stable/c/89c65f2fcd8801365b410f40a427cbcd7f4c28e9"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf16bca6653679d8a514d6c1c5a2c67065033f14"
        }
      ],
      "title": "net/mlx5: lag: Check for LAG device before creating debugfs",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43013",
    "datePublished": "2026-05-01T14:15:18.907Z",
    "dateReserved": "2026-05-01T14:12:55.974Z",
    "dateUpdated": "2026-05-01T14:15:18.907Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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