CVE-2022-50329

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

15/09/2025

Last modified:

04/12/2025

Description

In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq Commit 64dc8c732f5c ("block, bfq: fix possible uaf for &#39;bfqq->bic&#39;") will access &#39;bic->bfqq&#39; in bic_set_bfqq(), however, bfq_exit_icq_bfqq() can free bfqq first, and then call bic_set_bfqq(), which will cause uaf. Fix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().

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:5.15.86:::::::*
cpe:2.3:o:linux:linux_kernel:6.0.16:::::::*
cpe:2.3:o:linux:linux_kernel:6.1.2:::::::*
cpe:2.3:o:linux:linux_kernel:6.2:rc1::::::

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

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel:5.15.86:::::::*
cpe:2.3:o:linux:linux_kernel:6.0.16:::::::*
cpe:2.3:o:linux:linux_kernel:6.1.2:::::::*
cpe:2.3:o:linux:linux_kernel:6.2:rc1::::::

CVE-2022-50329

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools