FKIE_CVE-2026-43013

Vulnerability from fkie_nvd - Published: 2026-05-01 15:16 - Updated: 2026-05-01 15:24
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7129632cab3e4d23510b21930aa73b8d97a859f5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89c65f2fcd8801365b410f40a427cbcd7f4c28e9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a3db46d5f4df92630a96f7bc77b60e75c2353e06
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bf16bca6653679d8a514d6c1c5a2c67065033f14
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c53cf44588a93000f71817a6bb87a66353c48dee
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cfa774e6c920c81e700327bf10db8cb50d5db456
Impacted products
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{
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-43013",
  "lastModified": "2026-05-01T15:24:14.893",
  "metrics": {},
  "published": "2026-05-01T15:16:45.243",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7129632cab3e4d23510b21930aa73b8d97a859f5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/89c65f2fcd8801365b410f40a427cbcd7f4c28e9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a3db46d5f4df92630a96f7bc77b60e75c2353e06"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bf16bca6653679d8a514d6c1c5a2c67065033f14"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c53cf44588a93000f71817a6bb87a66353c48dee"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cfa774e6c920c81e700327bf10db8cb50d5db456"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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