{"id":"CVE-2026-43013","title":"net/mlx5: lag: Check for LAG device before creating debugfs","summary":"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. Cons…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 7f46a0b7327ae261f9981888708dbca22c283900 < a3db46d5f4df92630a96f7bc77b60e75c2353e06","Linux >= 7f46a0b7327ae261f9981888708dbca22c283900 < 7129632cab3e4d23510b21930aa73b8d97a859f5","Linux >= 7f46a0b7327ae261f9981888708dbca22c283900 < cfa774e6c920c81e700327bf10db8cb50d5db456","Linux >= 7f46a0b7327ae261f9981888708dbca22c283900 < c53cf44588a93000f71817a6bb87a66353c48dee","Linux >= 7f46a0b7327ae261f9981888708dbca22c283900 < 89c65f2fcd8801365b410f40a427cbcd7f4c28e9","Linux >= 7f46a0b7327ae261f9981888708dbca22c283900 < bf16bca6653679d8a514d6c1c5a2c67065033f14","Linux 5.19"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:25:52.038393Z"},"published":"2026-05-01","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:32:26.150Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43013","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"}],"tags":["cve.org"],"epss":0.00123,"epssPercentile":0.02027,"ingestedAt":"2026-11-06T15:54:04.038Z","slug":"CVE-2026-43013","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 7f46a0b7327ae261f9981888708dbca22c283900 < a3db46d5f4df92630a96f7bc77b60e75c2353e06`\n- `Linux >= 7f46a0b7327ae261f9981888708dbca22c283900 < 7129632cab3e4d23510b21930aa73b8d97a859f5`\n- `Linux >= 7f46a0b7327ae261f9981888708dbca22c283900 < cfa774e6c920c81e700327bf10db8cb50d5db456`\n- `Linux >= 7f46a0b7327ae261f9981888708dbca22c283900 < c53cf44588a93000f71817a6bb87a66353c48dee`\n- `Linux >= 7f46a0b7327ae261f9981888708dbca22c283900 < 89c65f2fcd8801365b410f40a427cbcd7f4c28e9`\n- `Linux >= 7f46a0b7327ae261f9981888708dbca22c283900 < bf16bca6653679d8a514d6c1c5a2c67065033f14`\n- `Linux 5.19`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}