net/mlx5: lag: Check for LAG device before creating debugfs
Summary
| CVE | CVE-2026-43013 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-01 15:16:45 UTC |
| Updated | 2026-05-01 15:24:14 UTC |
| 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. |
Risk And Classification
EPSS: 0.000240000 probability, percentile 0.067950000 (date 2026-05-04)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 7f46a0b7327ae261f9981888708dbca22c283900 a3db46d5f4df92630a96f7bc77b60e75c2353e06 git | Not specified |
| CNA | Linux | Linux | affected 7f46a0b7327ae261f9981888708dbca22c283900 7129632cab3e4d23510b21930aa73b8d97a859f5 git | Not specified |
| CNA | Linux | Linux | affected 7f46a0b7327ae261f9981888708dbca22c283900 cfa774e6c920c81e700327bf10db8cb50d5db456 git | Not specified |
| CNA | Linux | Linux | affected 7f46a0b7327ae261f9981888708dbca22c283900 c53cf44588a93000f71817a6bb87a66353c48dee git | Not specified |
| CNA | Linux | Linux | affected 7f46a0b7327ae261f9981888708dbca22c283900 89c65f2fcd8801365b410f40a427cbcd7f4c28e9 git | Not specified |
| CNA | Linux | Linux | affected 7f46a0b7327ae261f9981888708dbca22c283900 bf16bca6653679d8a514d6c1c5a2c67065033f14 git | Not specified |
| CNA | Linux | Linux | affected 5.19 | Not specified |
| CNA | Linux | Linux | unaffected 5.19 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.168 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.134 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.81 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.22 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.12 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/bf16bca6653679d8a514d6c1c5a2c67065033f14 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/89c65f2fcd8801365b410f40a427cbcd7f4c28e9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a3db46d5f4df92630a96f7bc77b60e75c2353e06 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/cfa774e6c920c81e700327bf10db8cb50d5db456 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c53cf44588a93000f71817a6bb87a66353c48dee | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7129632cab3e4d23510b21930aa73b8d97a859f5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.