CVE-2023-2235

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

01/05/2023

Last modified:

25/08/2023

Description

A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation. The perf_group_detach function did not check the event&#39;s siblings&#39; attach_state before calling add_event_to_groups(), but remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability. We recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.

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::::::::	5.13 (including)	5.15.104 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.21 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.2.8 (excluding)

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

CVE-2023-2235

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools