CVE-2022-48770

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

20/06/2024

Last modified:

06/01/2025

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack() task_pt_regs() can return NULL on powerpc for kernel threads. This is then used in __bpf_get_stack() to check for user mode, resulting in a kernel oops. Guard against this by checking return value of task_pt_regs() before trying to obtain the call chain.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	5.9 (including)	5.10.96 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.19 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	5.16.5 (excluding)
cpe:2.3:o:linux:linux_kernel:5.17:rc1::::::

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

CVE-2022-48770

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools