CVE-2022-49147

In the Linux kernel, the following vulnerability has been resolved: block: Fix the maximum minor value is blk_alloc_ext_minor() ida_alloc_range(..., min, max, ...) returns values from min to max, inclusive. So, NR_EXT_DEVT is a valid idx returned by blk_alloc_ext_minor(). This is an issue because in device_add_disk(), this value is used in: ddev->devt = MKDEV(disk->major, disk->first_minor); and NR_EXT_DEVT is '(1 << MINORBITS)'. So, should 'disk->first_minor' be NR_EXT_DEVT, it would overflow.

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/0f8cf8f5ccbad25ed6828875b222dbab29d5c272	Patch
https://git.kernel.org/stable/c/5b9ac3727e4abb11c9cfbe9c0781fc05dfdd7cfb	Patch
https://git.kernel.org/stable/c/d1868328dec5ae2cf210111025fcbc71f78dd5ca	Patch
https://git.kernel.org/stable/c/fbe2cc4525480ddd20c866bb5c0578071e01451a	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 : 2025-02-26 07:00

Updated : 2025-10-15 19:47

NVD link : CVE-2022-49147

Mitre link : CVE-2022-49147

CVE.ORG link : CVE-2022-49147

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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