CVE-2025-39742

Severity CVSS v4.0:

Pending analysis

Type:

CWE-369 Divide By Zero

Publication date:

11/09/2025

Last modified:

09/01/2026

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA: hfi1: fix possible divide-by-zero in find_hw_thread_mask() The function divides number of online CPUs by num_core_siblings, and later checks the divider by zero. This implies a possibility to get and divide-by-zero runtime error. Fix it by moving the check prior to division. This also helps to save one indentation level.

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::::::::	4.8 (including)	5.4.297 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.241 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.190 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.149 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.103 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.43 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.15.11 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.16 (including)	6.16.2 (excluding)
cpe:2.3:o:debian:debian_linux:11.0:::::::*

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

CVE-2025-39742

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools