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CVE-2020-36784 (GCVE-0-2020-36784)

Vulnerability from cvelistv5 – Published: 2024-02-28 08:13 – Updated: 2026-05-11 13:42
VLAI
Title
i2c: cadence: fix reference leak when pm_runtime_get_sync fails
Summary
In the Linux kernel, the following vulnerability has been resolved: i2c: cadence: fix reference leak when pm_runtime_get_sync fails The PM reference count is not expected to be incremented on return in functions cdns_i2c_master_xfer and cdns_reg_slave. However, pm_runtime_get_sync will increment pm usage counter even failed. Forgetting to putting operation will result in a reference leak here. Replace it with pm_runtime_resume_and_get to keep usage counter balanced.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:01 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7fa32329ca03148fb2c07b4ef3247b8fc0488d6a , < 30410519328c94367e561fd878e5f0d3a0303585 (git)
Affected: 7fa32329ca03148fb2c07b4ef3247b8fc0488d6a , < d57ff04e0ed6f3be1682ae861ead33f879225e07 (git)
Affected: 7fa32329ca03148fb2c07b4ef3247b8fc0488d6a , < a45fc41beed8e0fe31864619c34aa00797fb60c1 (git)
Affected: 7fa32329ca03148fb2c07b4ef3247b8fc0488d6a , < 23ceb8462dc6f4b4decdb5536a7e5fc477cdf0b6 (git)
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Linux Linux Affected: 4.5
Unaffected: 0 , < 4.5 (semver)
Unaffected: 5.10.37 , ≤ 5.10.* (semver)
Unaffected: 5.11.21 , ≤ 5.11.* (semver)
Unaffected: 5.12.4 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/30410519328c94367e561fd878e5f0d3a0303585\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/d57ff04e0ed6f3be1682ae861ead33f879225e07\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a45fc41beed8e0fe31864619c34aa00797fb60c1\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/23ceb8462dc6f4b4decdb5536a7e5fc477cdf0b6\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T17:37:07.220Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2020-36784\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:01:21.710777Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:18.280Z\"}}], \"cna\": {\"title\": \"i2c: cadence: fix reference leak when pm_runtime_get_sync fails\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"7fa32329ca03148fb2c07b4ef3247b8fc0488d6a\", \"lessThan\": \"30410519328c94367e561fd878e5f0d3a0303585\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7fa32329ca03148fb2c07b4ef3247b8fc0488d6a\", \"lessThan\": \"d57ff04e0ed6f3be1682ae861ead33f879225e07\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7fa32329ca03148fb2c07b4ef3247b8fc0488d6a\", \"lessThan\": \"a45fc41beed8e0fe31864619c34aa00797fb60c1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7fa32329ca03148fb2c07b4ef3247b8fc0488d6a\", \"lessThan\": \"23ceb8462dc6f4b4decdb5536a7e5fc477cdf0b6\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/i2c/busses/i2c-cadence.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.5\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.5\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.37\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.11.21\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.11.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/i2c/busses/i2c-cadence.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/30410519328c94367e561fd878e5f0d3a0303585\"}, {\"url\": \"https://git.kernel.org/stable/c/d57ff04e0ed6f3be1682ae861ead33f879225e07\"}, {\"url\": \"https://git.kernel.org/stable/c/a45fc41beed8e0fe31864619c34aa00797fb60c1\"}, {\"url\": \"https://git.kernel.org/stable/c/23ceb8462dc6f4b4decdb5536a7e5fc477cdf0b6\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ni2c: cadence: fix reference leak when pm_runtime_get_sync fails\\n\\nThe PM reference count is not expected to be incremented on\\nreturn in functions cdns_i2c_master_xfer and cdns_reg_slave.\\n\\nHowever, pm_runtime_get_sync will increment pm usage counter\\neven failed. Forgetting to putting operation will result in a\\nreference leak here.\\n\\nReplace it with pm_runtime_resume_and_get to keep usage\\ncounter balanced.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.37\", \"versionStartIncluding\": \"4.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.11.21\", \"versionStartIncluding\": \"4.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.4\", \"versionStartIncluding\": \"4.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"4.5\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T13:42:50.017Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2020-36784\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T13:42:50.017Z\", \"dateReserved\": \"2024-02-26T17:07:27.435Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-28T08:13:05.418Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.