CVE-2021-47258

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Fix error handling of scsi_host_alloc() After device is initialized via device_initialize(), or its name is set via dev_set_name(), the device has to be freed via put_device(). Otherwise device name will be leaked because it is allocated dynamically in dev_set_name(). Fix the leak by replacing kfree() with put_device(). Since scsi_host_dev_release() properly handles IDA and kthread removal, remove special-casing these from the error handling as well.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

V3 Legend

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/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a	Patch
https://git.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7	Patch
https://git.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006	Patch
https://git.kernel.org/stable/c/79296e292d67fa7b5fb8d8c27343683e823872c8	Patch
https://git.kernel.org/stable/c/7a696ce1d5d16a33a6cd6400bbcc0339b2460e11	Patch
https://git.kernel.org/stable/c/8958181c1663e24a13434448e7d6b96b5d04900a	Patch
https://git.kernel.org/stable/c/db08ce595dd64ea9859f7d088b51cbfc8e685c66	Patch
https://git.kernel.org/stable/c/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a	Patch
https://git.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7	Patch
https://git.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006	Patch
https://git.kernel.org/stable/c/79296e292d67fa7b5fb8d8c27343683e823872c8	Patch
https://git.kernel.org/stable/c/7a696ce1d5d16a33a6cd6400bbcc0339b2460e11	Patch
https://git.kernel.org/stable/c/8958181c1663e24a13434448e7d6b96b5d04900a	Patch
https://git.kernel.org/stable/c/db08ce595dd64ea9859f7d088b51cbfc8e685c66	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::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc1::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc2::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc3::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc4::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc5::::::

History

30 Apr 2025, 15:05

Type	Values Removed	Values Added
CPE		cpe:2.3:o:linux:linux_kernel:::::::: cpe:2.3:o:linux:linux_kernel:5.13:rc2:::::: cpe:2.3:o:linux:linux_kernel:5.13:rc5:::::: cpe:2.3:o:linux:linux_kernel:5.13:rc1:::::: cpe:2.3:o:linux:linux_kernel:5.13:rc3:::::: cpe:2.3:o:linux:linux_kernel:5.13:rc4::::::
First Time		Linux linux Kernel Linux
CWE		CWE-401
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
References	~~() https://git.kernel.org/stable/c/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a -~~	() https://git.kernel.org/stable/c/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a - Patch
References	~~() https://git.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7 -~~	() https://git.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7 - Patch
References	~~() https://git.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006 -~~	() https://git.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006 - Patch
References	~~() https://git.kernel.org/stable/c/79296e292d67fa7b5fb8d8c27343683e823872c8 -~~	() https://git.kernel.org/stable/c/79296e292d67fa7b5fb8d8c27343683e823872c8 - Patch
References	~~() https://git.kernel.org/stable/c/7a696ce1d5d16a33a6cd6400bbcc0339b2460e11 -~~	() https://git.kernel.org/stable/c/7a696ce1d5d16a33a6cd6400bbcc0339b2460e11 - Patch
References	~~() https://git.kernel.org/stable/c/8958181c1663e24a13434448e7d6b96b5d04900a -~~	() https://git.kernel.org/stable/c/8958181c1663e24a13434448e7d6b96b5d04900a - Patch
References	~~() https://git.kernel.org/stable/c/db08ce595dd64ea9859f7d088b51cbfc8e685c66 -~~	() https://git.kernel.org/stable/c/db08ce595dd64ea9859f7d088b51cbfc8e685c66 - Patch

21 Nov 2024, 06:35

Type	Values Removed	Values Added
References	~~() https://git.kernel.org/stable/c/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a -~~	() https://git.kernel.org/stable/c/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a -
References	~~() https://git.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7 -~~	() https://git.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7 -
References	~~() https://git.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006 -~~	() https://git.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006 -
References	~~() https://git.kernel.org/stable/c/79296e292d67fa7b5fb8d8c27343683e823872c8 -~~	() https://git.kernel.org/stable/c/79296e292d67fa7b5fb8d8c27343683e823872c8 -
References	~~() https://git.kernel.org/stable/c/7a696ce1d5d16a33a6cd6400bbcc0339b2460e11 -~~	() https://git.kernel.org/stable/c/7a696ce1d5d16a33a6cd6400bbcc0339b2460e11 -
References	~~() https://git.kernel.org/stable/c/8958181c1663e24a13434448e7d6b96b5d04900a -~~	() https://git.kernel.org/stable/c/8958181c1663e24a13434448e7d6b96b5d04900a -
References	~~() https://git.kernel.org/stable/c/db08ce595dd64ea9859f7d088b51cbfc8e685c66 -~~	() https://git.kernel.org/stable/c/db08ce595dd64ea9859f7d088b51cbfc8e685c66 -
Summary		(es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: core: corrige el manejo de errores de scsi_host_alloc(). Después de que el dispositivo se inicializa mediante device_initialize(), o su nombre se establece mediante dev_set_name(), el dispositivo debe liberarse mediante put_device (). De lo contrario, se filtrará el nombre del dispositivo porque se asigna dinámicamente en dev_set_name(). Solucione la fuga reemplazando kfree() con put_device(). Dado que scsi_host_dev_release() maneja adecuadamente la eliminación de IDA y kthread, elimine también estas mayúsculas y minúsculas especiales del manejo de errores.

21 May 2024, 15:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-05-21 15:15

Updated : 2025-04-30 15:05

NVD link : CVE-2021-47258

Mitre link : CVE-2021-47258

CVE.ORG link : CVE-2021-47258

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

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Otherwise\ndevice name will be leaked because it is allocated dynamically in\ndev_set_name().\n\nFix the leak by replacing kfree() with put_device(). Since\nscsi_host_dev_release() properly handles IDA and kthread removal, remove\nspecial-casing these from the error handling as well."}, {"lang": "es", "value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: core: corrige el manejo de errores de scsi_host_alloc(). Despu\u00e9s de que el dispositivo se inicializa mediante device_initialize(), o su nombre se establece mediante dev_set_name(), el dispositivo debe liberarse mediante put_device (). De lo contrario, se filtrar\u00e1 el nombre del dispositivo porque se asigna din\u00e1micamente en dev_set_name(). Solucione la fuga reemplazando kfree() con put_device(). Dado que scsi_host_dev_release() maneja adecuadamente la eliminaci\u00f3n de IDA y kthread, elimine tambi\u00e9n estas may\u00fasculas y min\u00fasculas especiales del manejo de errores."}], "lastModified": "2025-04-30T15:05:14.067", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2AAF8753-C28A-4F2A-8469-E86334097252", "versionEndExcluding": "4.9.273"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "83CDDAD5-5539-46C9-9255-C1DAC38F7905", "versionEndExcluding": "4.14.237", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "23EECCE9-4D4C-4684-AB00-10C938F5DDC1", "versionEndExcluding": "4.19.195", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "876275F9-BEC7-40E8-9D7F-A20729A4A4FF", "versionEndExcluding": "5.4.126", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DA547B08-9D25-467B-AD0D-8460FE4EE70D", "versionEndExcluding": "5.10.44", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F914A757-FAFD-407E-9031-21F66635D5EA", "versionEndExcluding": "5.12.11", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DA610E30-717C-4700-9F77-A3C9244F3BFD"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1ECD33F5-85BE-430B-8F86-8D7BD560311D"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CF351855-2437-4CF5-AD7C-BDFA51F27683"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}

5.5 /10