CVE-2025-39742

MEDIUM

Linux Kernel - Divide By Zero in RDMA hfi1 find_hw_thread_mask()

Title source: llm
STIX 2.1

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.

References (12)

Core 12
Core References

Scores

CVSS v3 5.5
EPSS 0.0016
EPSS Percentile 5.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-369
Status published
Products (30)
debian/debian_linux 11.0
linux/Kernel 4.8.0 - 5.4.297linux
linux/Kernel 5.11.0 - 5.15.190linux
linux/Kernel 5.16.0 - 6.1.149linux
linux/Kernel 5.5.0 - 5.10.241linux
linux/Kernel 6.13.0 - 6.15.11linux
linux/Kernel 6.16.0 - 6.16.2linux
linux/Kernel 6.2.0 - 6.6.103linux
linux/Kernel 6.7.0 - 6.12.43linux
Linux/Linux < 4.8
... and 20 more
Published Sep 11, 2025
Tracked Since Feb 18, 2026