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CVE-2025-39742

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CVE-2025-39742

Published: Sep 11, 2025

Modified: May 12, 2026

PUBLISHED

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.

VendorProductVersions

Linux

Linux

affected
b094a36f90975373c3a241839869217a65f17d81 - < 9bba1a9994c523b44db64f63b564b4719ea2b7ef
affected
b094a36f90975373c3a241839869217a65f17d81 - < 1a7cf828ed861de5be1aff99e10f114b363c19d3
affected
b094a36f90975373c3a241839869217a65f17d81 - < 9d3211cb61a0773a2440d0a0698c1e6e7429f907
affected
b094a36f90975373c3a241839869217a65f17d81 - < 4b4317b0d758ff92ba96f4e448a8992a6fe607bf
affected
b094a36f90975373c3a241839869217a65f17d81 - < 89fdac333a17ed990b41565630ef4791782e02f5

+4 more versions

Linux

Linux

affected
4.8
unaffected
0 - < 4.8
unaffected
5.4.297 - <= 5.4.*
unaffected
5.10.241 - <= 5.10.*
unaffected
5.15.190 - <= 5.15.*

+6 more versions

References

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