Vulnerability-Lookup

FKIE_CVE-2026-43013

Vulnerability from fkie_nvd - Published: 2026-05-01 15:16 - Updated: 2026-05-07 20:28

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7129632cab3e4d23510b21930aa73b8d97a859f5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/89c65f2fcd8801365b410f40a427cbcd7f4c28e9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a3db46d5f4df92630a96f7bc77b60e75c2353e06	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bf16bca6653679d8a514d6c1c5a2c67065033f14	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c53cf44588a93000f71817a6bb87a66353c48dee	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cfa774e6c920c81e700327bf10db8cb50d5db456	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
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      "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."
    }
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  "id": "CVE-2026-43013",
  "lastModified": "2026-05-07T20:28:55.537",
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
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  "published": "2026-05-01T15:16:45.243",
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  "vulnStatus": "Analyzed",
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}

CVE-2026-43013 (GCVE-0-2026-43013)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:15 – Updated: 2026-05-11 22:16

Title

net/mlx5: lag: Check for LAG device before creating debugfs

Summary

Severity

No CVSS data available.

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/a3db46d5f4df92630…
https://git.kernel.org/stable/c/7129632cab3e4d235…
https://git.kernel.org/stable/c/cfa774e6c920c81e7…
https://git.kernel.org/stable/c/c53cf44588a93000f…
https://git.kernel.org/stable/c/89c65f2fcd8801365…
https://git.kernel.org/stable/c/bf16bca6653679d8a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7f46a0b7327ae261f9981888708dbca22c283900 , < a3db46d5f4df92630a96f7bc77b60e75c2353e06 (git) Affected: 7f46a0b7327ae261f9981888708dbca22c283900 , < 7129632cab3e4d23510b21930aa73b8d97a859f5 (git) Affected: 7f46a0b7327ae261f9981888708dbca22c283900 , < cfa774e6c920c81e700327bf10db8cb50d5db456 (git) Affected: 7f46a0b7327ae261f9981888708dbca22c283900 , < c53cf44588a93000f71817a6bb87a66353c48dee (git) Affected: 7f46a0b7327ae261f9981888708dbca22c283900 , < 89c65f2fcd8801365b410f40a427cbcd7f4c28e9 (git) Affected: 7f46a0b7327ae261f9981888708dbca22c283900 , < bf16bca6653679d8a514d6c1c5a2c67065033f14 (git)
Linux	Linux	Affected: 5.19 Unaffected: 0 , < 5.19 (semver) Unaffected: 6.1.168 , ≤ 6.1.* (semver) Unaffected: 6.6.134 , ≤ 6.6.* (semver) Unaffected: 6.12.81 , ≤ 6.12.* (semver) Unaffected: 6.18.22 , ≤ 6.18.* (semver) Unaffected: 6.19.12 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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            "drivers/net/ethernet/mellanox/mlx5/core/lag/debugfs.c"
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-43013

CVE-2026-43013 (GCVE-0-2026-43013)

Tags

Sightings

Nomenclature