CVE-2020-36778

In the Linux kernel, the following vulnerability has been resolved: i2c: xiic: fix reference leak when pm_runtime_get_sync fails The PM reference count is not expected to be incremented on return in xiic_xfer and xiic_i2c_remove. However, pm_runtime_get_sync will increment the PM reference count 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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/a42ac16e6573f19c78f556ea292f5b534fcc4514	Patch
https://git.kernel.org/stable/c/a85c5c7a3aa8041777ff691400b4046e56149fd3	Patch
https://git.kernel.org/stable/c/c977426db644ba476938125597947979e8aba725	Patch
https://git.kernel.org/stable/c/e2ba996577eaea423694dc69ae43d56f1410a22b	Patch
https://git.kernel.org/stable/c/a42ac16e6573f19c78f556ea292f5b534fcc4514	Patch
https://git.kernel.org/stable/c/a85c5c7a3aa8041777ff691400b4046e56149fd3	Patch
https://git.kernel.org/stable/c/c977426db644ba476938125597947979e8aba725	Patch
https://git.kernel.org/stable/c/e2ba996577eaea423694dc69ae43d56f1410a22b	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-02-28 09:15

Updated : 2024-12-06 17:56

NVD link : CVE-2020-36778

Mitre link : CVE-2020-36778

CVE.ORG link : CVE-2020-36778

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-Other

{"id": "CVE-2020-36778", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-02-28T09:15:36.457", "references": [{"url": "https://git.kernel.org/stable/c/a42ac16e6573f19c78f556ea292f5b534fcc4514", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a85c5c7a3aa8041777ff691400b4046e56149fd3", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c977426db644ba476938125597947979e8aba725", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e2ba996577eaea423694dc69ae43d56f1410a22b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a42ac16e6573f19c78f556ea292f5b534fcc4514", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/a85c5c7a3aa8041777ff691400b4046e56149fd3", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/c977426db644ba476938125597947979e8aba725", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/e2ba996577eaea423694dc69ae43d56f1410a22b", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-Other"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: xiic: fix reference leak when pm_runtime_get_sync fails\n\nThe PM reference count is not expected to be incremented on\nreturn in xiic_xfer and xiic_i2c_remove.\n\nHowever, pm_runtime_get_sync will increment the PM reference\ncount even failed. Forgetting to putting operation will result\nin a reference leak here.\n\nReplace it with pm_runtime_resume_and_get to keep usage\ncounter balanced."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: i2c: xiic: corrige la fuga de referencia cuando falla pm_runtime_get_sync No se espera que el recuento de referencias de PM aumente al regresar en xiic_xfer y xiic_i2c_remove. Sin embargo, pm_runtime_get_sync incrementar\u00e1 el recuento de referencias de PM incluso si falla. Olvidarse de poner en funcionamiento resultar\u00e1 en una fuga de referencia aqu\u00ed. Reempl\u00e1celo con pm_runtime_resume_and_get para mantener el contador de uso equilibrado."}], "lastModified": "2024-12-06T17:56:05.877", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8DAB7F83-8B24-421D-A7BE-C8380EDFC077", "versionEndExcluding": "5.10.37", "versionStartIncluding": "5.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8CBB94EC-EC33-4464-99C5-03E5542715F0", "versionEndExcluding": "5.11.21", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D8C7052F-1B7B-4327-9C2B-84EBF3243838", "versionEndExcluding": "5.12.4", "versionStartIncluding": "5.12"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}