CVE-2025-39742
RDMA: hfi1: fix possible divide-by-zero in find_hw_thread_mask()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 11, 2025 |
| Last Updated | May 12, 2026 |
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Affected Versions
Linux / Linux
b094a36f90975373c3a241839869217a65f17d81 < 9bba1a9994c523b44db64f63b564b4719ea2b7ef b094a36f90975373c3a241839869217a65f17d81 < 1a7cf828ed861de5be1aff99e10f114b363c19d3 b094a36f90975373c3a241839869217a65f17d81 < 9d3211cb61a0773a2440d0a0698c1e6e7429f907 b094a36f90975373c3a241839869217a65f17d81 < 4b4317b0d758ff92ba96f4e448a8992a6fe607bf b094a36f90975373c3a241839869217a65f17d81 < 89fdac333a17ed990b41565630ef4791782e02f5 b094a36f90975373c3a241839869217a65f17d81 < 9b05e91afe948ed819bf87d7ba0fccf451ed79a6 b094a36f90975373c3a241839869217a65f17d81 < 31d0599a23efdbfe579bfbd1eb8f8c942f13744d b094a36f90975373c3a241839869217a65f17d81 < ac53f377393cc85156afdc90b636e84e544a6f96 b094a36f90975373c3a241839869217a65f17d81 < 59f7d2138591ef8f0e4e4ab5f1ab674e8181ad3a
Linux / Linux
4.8
References
git.kernel.org: https://git.kernel.org/stable/c/9bba1a9994c523b44db64f63b564b4719ea2b7ef git.kernel.org: https://git.kernel.org/stable/c/1a7cf828ed861de5be1aff99e10f114b363c19d3 git.kernel.org: https://git.kernel.org/stable/c/9d3211cb61a0773a2440d0a0698c1e6e7429f907 git.kernel.org: https://git.kernel.org/stable/c/4b4317b0d758ff92ba96f4e448a8992a6fe607bf git.kernel.org: https://git.kernel.org/stable/c/89fdac333a17ed990b41565630ef4791782e02f5 git.kernel.org: https://git.kernel.org/stable/c/9b05e91afe948ed819bf87d7ba0fccf451ed79a6 git.kernel.org: https://git.kernel.org/stable/c/31d0599a23efdbfe579bfbd1eb8f8c942f13744d git.kernel.org: https://git.kernel.org/stable/c/ac53f377393cc85156afdc90b636e84e544a6f96 git.kernel.org: https://git.kernel.org/stable/c/59f7d2138591ef8f0e4e4ab5f1ab674e8181ad3a lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html cert-portal.siemens.com: https://cert-portal.siemens.com/productcert/html/ssa-032379.html