Vulnerability-Lookup

GHSA-67HF-FH94-4RJ7

Vulnerability from github – Published: 2026-08-22 18:30 – Updated: 2026-08-22 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

devlink: fix net namespace reference leak in reload

devlink_nl_reload_doit() calls devlink_netns_get(), which returns a net with a held reference. When the requested namespace differs from the current one and the reload action is not DRIVER_REINIT, the function returns -EOPNOTSUPP without releasing the reference. Add the missing put_net() on this error path.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74718"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T16:16:46Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndevlink: fix net namespace reference leak in reload\n\ndevlink_nl_reload_doit() calls devlink_netns_get(), which returns a net\nwith a held reference. When the requested namespace differs from the\ncurrent one and the reload action is not DRIVER_REINIT, the function\nreturns -EOPNOTSUPP without releasing the reference. Add the missing\nput_net() on this error path.",
  "id": "GHSA-67hf-fh94-4rj7",
  "modified": "2026-08-22T18:30:30Z",
  "published": "2026-08-22T18:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74718"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1c4dac9bf1d2ac31da63b794bdec697777cbd0fd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7b02c6d2a3cd2cd669f5c16685779f84328ae60c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7b6552e53426ea0539c667bbc5a524fdf7feae6f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bf0797b92be591ac71d7c0f610e695caca3c72c9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eda60c85b4f4c7d66b7141a5fe020b1a7f395341"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-74718 (GCVE-0-2026-74718)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:33 – Updated: 2026-08-22 15:33

Title

devlink: fix net namespace reference leak in reload

Summary

In the Linux kernel, the following vulnerability has been resolved: devlink: fix net namespace reference leak in reload devlink_nl_reload_doit() calls devlink_netns_get(), which returns a net with a held reference. When the requested namespace differs from the current one and the reload action is not DRIVER_REINIT, the function returns -EOPNOTSUPP without releasing the reference. Add the missing put_net() on this error path.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/7b6552e53426ea053…
https://git.kernel.org/stable/c/bf0797b92be591ac7…
https://git.kernel.org/stable/c/7b02c6d2a3cd2cd66…
https://git.kernel.org/stable/c/eda60c85b4f4c7d66…
https://git.kernel.org/stable/c/1c4dac9bf1d2ac31d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2edd92570441dd33246210042dc167319a5cf7e3 , < 7b6552e53426ea0539c667bbc5a524fdf7feae6f (git) Affected: 2edd92570441dd33246210042dc167319a5cf7e3 , < bf0797b92be591ac71d7c0f610e695caca3c72c9 (git) Affected: 2edd92570441dd33246210042dc167319a5cf7e3 , < 7b02c6d2a3cd2cd669f5c16685779f84328ae60c (git) Affected: 2edd92570441dd33246210042dc167319a5cf7e3 , < eda60c85b4f4c7d66b7141a5fe020b1a7f395341 (git) Affected: 2edd92570441dd33246210042dc167319a5cf7e3 , < 1c4dac9bf1d2ac31da63b794bdec697777cbd0fd (git)
Linux	Linux	Affected: 6.3 Unaffected: 0 , < 6.3 (semver) Unaffected: 6.6.152 , ≤ 6.6.* (semver) Unaffected: 6.12.104 , ≤ 6.12.* (semver) Unaffected: 6.18.45 , ≤ 6.18.* (semver) Unaffected: 7.1.9 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/devlink/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7b6552e53426ea0539c667bbc5a524fdf7feae6f",
              "status": "affected",
              "version": "2edd92570441dd33246210042dc167319a5cf7e3",
              "versionType": "git"
            },
            {
              "lessThan": "bf0797b92be591ac71d7c0f610e695caca3c72c9",
              "status": "affected",
              "version": "2edd92570441dd33246210042dc167319a5cf7e3",
              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
              "lessThan": "eda60c85b4f4c7d66b7141a5fe020b1a7f395341",
              "status": "affected",
              "version": "2edd92570441dd33246210042dc167319a5cf7e3",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/devlink/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.3"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.3",
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                },
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndevlink: fix net namespace reference leak in reload\n\ndevlink_nl_reload_doit() calls devlink_netns_get(), which returns a net\nwith a held reference. When the requested namespace differs from the\ncurrent one and the reload action is not DRIVER_REINIT, the function\nreturns -EOPNOTSUPP without releasing the reference. Add the missing\nput_net() on this error path."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T15:33:12.106Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/1c4dac9bf1d2ac31da63b794bdec697777cbd0fd"
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      ],
      "title": "devlink: fix net namespace reference leak in reload",
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    "cveId": "CVE-2026-74718",
    "datePublished": "2026-08-22T15:33:12.106Z",
    "dateReserved": "2026-08-15T05:44:03.928Z",
    "dateUpdated": "2026-08-22T15:33:12.106Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-67HF-FH94-4RJ7

CVE-2026-74718 (GCVE-0-2026-74718)

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Sightings

Nomenclature