CVE-2022-49377

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

26/02/2025

Last modified:

25/03/2025

Description

In the Linux kernel, the following vulnerability has been resolved: blk-mq: don&#39;t touch ->tagset in blk_mq_get_sq_hctx blk_mq_run_hw_queues() could be run when there isn&#39;t queued request and after queue is cleaned up, at that time tagset is freed, because tagset lifetime is covered by driver, and often freed after blk_cleanup_queue() returns. So don&#39;t touch ->tagset for figuring out current default hctx by the mapping built in request queue, so use-after-free on tagset can be avoided. Meantime this way should be fast than retrieving mapping from tagset.

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::::::::	5.12 (including)	5.15.47 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	5.17.15 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.18 (including)	5.18.4 (excluding)

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

CVE-2022-49377

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools