Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2021-47427

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
21/05/2024
Last modified:
31/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> scsi: iscsi: Fix iscsi_task use after free<br /> <br /> Commit d39df158518c ("scsi: iscsi: Have abort handler get ref to conn")<br /> added iscsi_get_conn()/iscsi_put_conn() calls during abort handling but<br /> then also changed the handling of the case where we detect an already<br /> completed task where we now end up doing a goto to the common put/cleanup<br /> code. This results in a iscsi_task use after free, because the common<br /> cleanup code will do a put on the iscsi_task.<br /> <br /> This reverts the goto and moves the iscsi_get_conn() to after we&amp;#39;ve checked<br /> if the iscsi_task is valid.

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:*:*:*:*:*:*:*:* 5.14 (including) 5.14.12 (excluding)
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools