Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2022-49147

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
26/02/2025
Last modified:
15/10/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> block: Fix the maximum minor value is blk_alloc_ext_minor()<br /> <br /> ida_alloc_range(..., min, max, ...) returns values from min to max,<br /> inclusive.<br /> <br /> So, NR_EXT_DEVT is a valid idx returned by blk_alloc_ext_minor().<br /> <br /> This is an issue because in device_add_disk(), this value is used in:<br /> ddev-&gt;devt = MKDEV(disk-&gt;major, disk-&gt;first_minor);<br /> and NR_EXT_DEVT is &amp;#39;(1

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.15.33 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 5.16.19 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.17 (including) 5.17.2 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools