Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2022-49694

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
26/02/2025
Last modified:
24/03/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> block: disable the elevator int del_gendisk<br /> <br /> The elevator is only used for file system requests, which are stopped in<br /> del_gendisk. Move disabling the elevator and freeing the scheduler tags<br /> to the end of del_gendisk instead of doing that work in disk_release and<br /> blk_cleanup_queue to avoid a use after free on q-&gt;tag_set from<br /> disk_release as the tag_set might not be alive at that point.<br /> <br /> Move the blk_qos_exit call as well, as it just depends on the elevator<br /> exit and would be the only reason to keep the not exactly cheap queue<br /> freeze in disk_release.

Impact

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

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 5.18.8 (excluding)
cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools