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CVE-2022-49016 (GCVE-0-2022-49016)

Vulnerability from cvelistv5 – Published: 2024-10-21 20:06 – Updated: 2026-05-11 18:51
VLAI
Title
net: mdiobus: fix unbalanced node reference count
Summary
In the Linux kernel, the following vulnerability has been resolved: net: mdiobus: fix unbalanced node reference count I got the following report while doing device(mscc-miim) load test with CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled: OF: ERROR: memory leak, expected refcount 1 instead of 2, of_node_get()/of_node_put() unbalanced - destroy cset entry: attach overlay node /spi/soc@0/mdio@7107009c/ethernet-phy@0 If the 'fwnode' is not an acpi node, the refcount is get in fwnode_mdiobus_phy_device_register(), but it has never been put when the device is freed in the normal path. So call fwnode_handle_put() in phy_device_release() to avoid leak. If it's an acpi node, it has never been get, but it's put in the error path, so call fwnode_handle_get() before phy_device_register() to keep get/put operation balanced.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-22 13:13 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bc1bee3b87ee48bd97ef7fd306445132ba2041b0 , < 543d917f691ab06885ee779c862065899eaa4251 (git)
Affected: bc1bee3b87ee48bd97ef7fd306445132ba2041b0 , < 2708b357440427d6a9fee667eb7b8307f4625adc (git)
Affected: bc1bee3b87ee48bd97ef7fd306445132ba2041b0 , < cdde1560118f82498fc9e9a7c1ef7f0ef7755891 (git)
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Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.82 , ≤ 5.15.* (semver)
Unaffected: 6.0.12 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-05T00:57:17Z",
      "cve": "CVE-2022-49016",
      "id": "CVE-2022-49016",
      "initial_release_date": "2024-10-22T14:22:13Z",
      "product_status:known_affected": "324",
      "product_status:known_not_affected": "379",
      "product_status:recommended": "394",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49016",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49016.json",
      "version": "43"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-49016\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-22T13:13:13.450914Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-22T13:13:16.544Z\"}}], \"cna\": {\"title\": \"net: mdiobus: fix unbalanced node reference count\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"bc1bee3b87ee48bd97ef7fd306445132ba2041b0\", \"lessThan\": \"543d917f691ab06885ee779c862065899eaa4251\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bc1bee3b87ee48bd97ef7fd306445132ba2041b0\", \"lessThan\": \"2708b357440427d6a9fee667eb7b8307f4625adc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bc1bee3b87ee48bd97ef7fd306445132ba2041b0\", \"lessThan\": \"cdde1560118f82498fc9e9a7c1ef7f0ef7755891\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/mdio/fwnode_mdio.c\", \"drivers/net/phy/phy_device.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.14\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.14\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.82\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.0.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.0.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/mdio/fwnode_mdio.c\", \"drivers/net/phy/phy_device.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/543d917f691ab06885ee779c862065899eaa4251\"}, {\"url\": \"https://git.kernel.org/stable/c/2708b357440427d6a9fee667eb7b8307f4625adc\"}, {\"url\": \"https://git.kernel.org/stable/c/cdde1560118f82498fc9e9a7c1ef7f0ef7755891\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: mdiobus: fix unbalanced node reference count\\n\\nI got the following report while doing device(mscc-miim) load test\\nwith CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled:\\n\\n  OF: ERROR: memory leak, expected refcount 1 instead of 2,\\n  of_node_get()/of_node_put() unbalanced - destroy cset entry:\\n  attach overlay node /spi/soc@0/mdio@7107009c/ethernet-phy@0\\n\\nIf the \u0027fwnode\u0027 is not an acpi node, the refcount is get in\\nfwnode_mdiobus_phy_device_register(), but it has never been\\nput when the device is freed in the normal path. So call\\nfwnode_handle_put() in phy_device_release() to avoid leak.\\n\\nIf it\u0027s an acpi node, it has never been get, but it\u0027s put\\nin the error path, so call fwnode_handle_get() before\\nphy_device_register() to keep get/put operation balanced.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T08:12:30.056Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49016\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T08:12:30.056Z\", \"dateReserved\": \"2024-08-22T01:27:53.645Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T20:06:25.294Z\", \"assignerShortName\": \"Linux\"}",
      "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

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.


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.