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

Vulnerability from cvelistv5 – Published: 2026-08-22 15:33 – Updated: 2026-08-22 15:33
VLAI
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 CNA under the mitre root
CNA scorecard D 53/100 over 6794 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2edd92570441dd33246210042dc167319a5cf7e3 , < 7b6552e53426ea0539c667bbc5a524fdf7feae6f (git)
Affected: 2edd92570441dd33246210042dc167319a5cf7e3 , < bf0797b92be591ac71d7c0f610e695caca3c72c9 (git)
Affected: 2edd92570441dd33246210042dc167319a5cf7e3 , < 7b02c6d2a3cd2cd669f5c16685779f84328ae60c (git)
Affected: 2edd92570441dd33246210042dc167319a5cf7e3 , < eda60c85b4f4c7d66b7141a5fe020b1a7f395341 (git)
Affected: 2edd92570441dd33246210042dc167319a5cf7e3 , < 1c4dac9bf1d2ac31da63b794bdec697777cbd0fd (git)
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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"
          ],
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "6.3"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
            }
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      ],
      "cpeApplicability": [
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          "nodes": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "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"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/7b6552e53426ea0539c667bbc5a524fdf7feae6f"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf0797b92be591ac71d7c0f610e695caca3c72c9"
        },
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          "url": "https://git.kernel.org/stable/c/7b02c6d2a3cd2cd669f5c16685779f84328ae60c"
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        },
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      "title": "devlink: fix net namespace reference leak in reload",
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    "assignerShortName": "Linux",
    "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"
  },
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      "date": "2026-11-01",
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      "percentile": "0.06073"
    },
    "microsoft_vex": {
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      "cve": "CVE-2026-74718",
      "id": "msrc_CVE-2026-74718",
      "initial_release_date": "2026-08-24T01:11:37.000Z",
      "product_status:fixed": "1",
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      "version": "4"
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                ],
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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."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndevlink: corrige la fuga de referencia del espacio de nombres de red en la recarga\n\ndevlink_nl_reload_doit() llama a devlink_netns_get(), que devuelve un net con una referencia retenida. Cuando el espacio de nombres solicitado difiere del actual y la acci\u00f3n de recarga no es DRIVER_REINIT, la funci\u00f3n devuelve -EOPNOTSUPP sin liberar la referencia. A\u00f1ade el put_net() que falta en esta ruta de error."
          }
        ],
        "id": "CVE-2026-74718",
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        "metrics": {},
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      "cve": "CVE-2026-74718",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: devlink: fix net namespace reference leak in reload",
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    }
  }
}



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