Description
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.
Affected products
linux: linux kernel
References6
- git.kernel.org/stable/c/7129632cab3e4d23510b21930aa73b8d97a859f5 Patch
- git.kernel.org/stable/c/89c65f2fcd8801365b410f40a427cbcd7f4c28e9 Patch
- git.kernel.org/stable/c/a3db46d5f4df92630a96f7bc77b60e75c2353e06 Patch
- git.kernel.org/stable/c/bf16bca6653679d8a514d6c1c5a2c67065033f14 Patch
- git.kernel.org/stable/c/c53cf44588a93000f71817a6bb87a66353c48dee Patch
- git.kernel.org/stable/c/cfa774e6c920c81e700327bf10db8cb50d5db456 Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 13 November 2026
- CWE
- CWE-476
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