CVE-2021-47058

In the Linux kernel, the following vulnerability has been resolved: regmap: set debugfs_name to NULL after it is freed There is a upstream commit cffa4b2122f5("regmap:debugfs: Fix a memory leak when calling regmap_attach_dev") that adds a if condition when create name for debugfs_name. With below function invoking logical, debugfs_name is freed in regmap_debugfs_exit(), but it is not created again because of the if condition introduced by above commit. regmap_reinit_cache() regmap_debugfs_exit() ... regmap_debugfs_init() So, set debugfs_name to NULL after it is freed.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867	Patch
https://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938a	Patch
https://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43d	Patch
https://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52	Patch
https://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268	Patch
https://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6	Patch
https://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867	Patch
https://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938a	Patch
https://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43d	Patch
https://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52	Patch
https://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268	Patch
https://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6	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::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-02-29 23:15

Updated : 2024-12-10 17:54

NVD link : CVE-2021-47058

Mitre link : CVE-2021-47058

CVE.ORG link : CVE-2021-47058

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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Hay una confirmaci\u00f3n ascendente cffa4b2122f5(\"regmap:debugfs: corrige una p\u00e9rdida de memoria al llamar a regmap_attach_dev\") que agrega una condici\u00f3n if al crear nombre para debugfs_name. Con la siguiente funci\u00f3n que invoca l\u00f3gica, debugfs_name se libera en regmap_debugfs_exit(), pero no se vuelve a crear debido a la condici\u00f3n if introducida por la confirmaci\u00f3n anterior. regmap_reinit_cache() regmap_debugfs_exit() ... regmap_debugfs_init() Entonces, establezca debugfs_name en NULL despu\u00e9s de liberarlo."}], "lastModified": "2024-12-10T17:54:27.030", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "12BBC180-E93E-467F-A88C-193868E50B5B", "versionEndExcluding": "4.19.191", "versionStartIncluding": "4.19.168"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "654180A0-0C0D-4CED-8729-870B4FD51987", "versionEndExcluding": "5.4.119", "versionStartIncluding": "5.4.90"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0A6FDAFA-1BAD-4123-A35E-C5E1001D1565", "versionEndExcluding": "5.10.37", "versionStartIncluding": "5.10.8"}, {"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"}