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.
Affected products
linux: linux kernel; debian: debian linux
References10
- git.kernel.org/stable/c/1a7cf828ed861de5be1aff99e10f114b363c19d3 Patch
- git.kernel.org/stable/c/31d0599a23efdbfe579bfbd1eb8f8c942f13744d Patch
- git.kernel.org/stable/c/4b4317b0d758ff92ba96f4e448a8992a6fe607bf Patch
- git.kernel.org/stable/c/59f7d2138591ef8f0e4e4ab5f1ab674e8181ad3a Patch
- git.kernel.org/stable/c/89fdac333a17ed990b41565630ef4791782e02f5 Patch
- git.kernel.org/stable/c/9b05e91afe948ed819bf87d7ba0fccf451ed79a6 Patch
- git.kernel.org/stable/c/9bba1a9994c523b44db64f63b564b4719ea2b7ef Patch
- git.kernel.org/stable/c/9d3211cb61a0773a2440d0a0698c1e6e7429f907 Patch
- git.kernel.org/stable/c/ac53f377393cc85156afdc90b636e84e544a6f96 Patch
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html Mailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 7 · as of 8 November 2026
- CWE
- CWE-369
Could this be exploited in your environment?
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