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Medium severity5.5NVD Advisory· Published Sep 11, 2025· Updated May 12, 2026

CVE-2025-39742

CVE-2025-39742

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.

AI Insight

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Affected products

252

Patches

Vulnerability mechanics

References

12

News mentions

1