CVE-2021-47368

Severity CVSS v4.0:

Pending analysis

Type:

CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')

Publication date:

21/05/2024

Last modified:

02/04/2025

Description

In the Linux kernel, the following vulnerability has been resolved: enetc: Fix illegal access when reading affinity_hint irq_set_affinity_hit() stores a reference to the cpumask_t parameter in the irq descriptor, and that reference can be accessed later from irq_affinity_hint_proc_show(). Since the cpu_mask parameter passed to irq_set_affinity_hit() has only temporary storage (it&#39;s on the stack memory), later accesses to it are illegal. Thus reads from the corresponding procfs affinity_hint file can result in paging request oops. The issue is fixed by the get_cpu_mask() helper, which provides a permanent storage for the cpumask_t parameter.

Impact

Vector 3.x

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

Base Score: 8.10 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

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

Base Score 3.x

8.10

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	5.1 (including)	5.4.150 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.70 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.14.9 (excluding)
cpe:2.3:o:linux:linux_kernel:5.15:rc1::::::
cpe:2.3:o:linux:linux_kernel:5.15:rc2::::::

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

CVE-2021-47368

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools