CVE-2021-47328

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

21/05/2024

Last modified:

26/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi: Fix conn use after free during resets If we haven&#39;t done a unbind target call we can race where iscsi_conn_teardown wakes up the EH thread and then frees the conn while those threads are still accessing the conn ehwait. We can only do one TMF per session so this just moves the TMF fields from the conn to the session. We can then rely on the iscsi_session_teardown->iscsi_remove_session->__iscsi_unbind_session call to remove the target and it&#39;s devices, and know after that point there is no device or scsi-ml callout trying to access the session.

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::::::::		4.19.198 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.134 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.52 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.12.19 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.13 (including)	5.13.4 (excluding)

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

CVE-2021-47328

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools