CVE-2021-47514 (GCVE-0-2021-47514)

Vulnerability from cvelistv5 – Published: 2024-05-24 15:09 – Updated: 2026-05-11 13:56
VLAI
Title
devlink: fix netns refcount leak in devlink_nl_cmd_reload()
Summary
In the Linux kernel, the following vulnerability has been resolved: devlink: fix netns refcount leak in devlink_nl_cmd_reload() While preparing my patch series adding netns refcount tracking, I spotted bugs in devlink_nl_cmd_reload() Some error paths forgot to release a refcount on a netns. To fix this, we can reduce the scope of get_net()/put_net() section around the call to devlink_reload().
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-24 19:18 UTC
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ccdf07219da6bd1f43c6ddcde4c0e36993c7365a , < 4b7e90672af8e0c78205db006f1b0a20ebd07f5f (git)
Affected: ccdf07219da6bd1f43c6ddcde4c0e36993c7365a , < fe30b70ca84da9c4aca85c03ad86e7a9b89c5ded (git)
Affected: ccdf07219da6bd1f43c6ddcde4c0e36993c7365a , < 4dbb0dad8e63fcd0b5a117c2861d2abe7ff5f186 (git)
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Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.85 , ≤ 5.10.* (semver)
Unaffected: 5.15.8 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndevlink: fix netns refcount leak in devlink_nl_cmd_reload()\n\nWhile preparing my patch series adding netns refcount tracking,\nI spotted bugs in devlink_nl_cmd_reload()\n\nSome error paths forgot to release a refcount on a netns.\n\nTo fix this, we can reduce the scope of get_net()/put_net()\nsection around the call to devlink_reload()."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-04T07:12:38.356Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/4b7e90672af8e0c78205db006f1b0a20ebd07f5f"
            },
            {
              "url": "https://git.kernel.org/stable/c/fe30b70ca84da9c4aca85c03ad86e7a9b89c5ded"
            },
            {
              "url": "https://git.kernel.org/stable/c/4dbb0dad8e63fcd0b5a117c2861d2abe7ff5f186"
            }
          ],
          "title": "devlink: fix netns refcount leak in devlink_nl_cmd_reload()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2021-47514",
        "datePublished": "2024-05-24T15:09:28.686Z",
        "dateReserved": "2024-05-24T15:02:54.824Z",
        "dateUpdated": "2025-05-04T07:12:38.356Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.