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.
Fix
Patch, vendor advisory and mitigation references on NVD 9
- https://git.kernel.org/stable/c/1a7cf828ed861de5be1aff99e10f114b363c19d3 Patch
- https://git.kernel.org/stable/c/31d0599a23efdbfe579bfbd1eb8f8c942f13744d Patch
- https://git.kernel.org/stable/c/4b4317b0d758ff92ba96f4e448a8992a6fe607bf Patch
- https://git.kernel.org/stable/c/59f7d2138591ef8f0e4e4ab5f1ab674e8181ad3a Patch
- https://git.kernel.org/stable/c/89fdac333a17ed990b41565630ef4791782e02f5 Patch
- https://git.kernel.org/stable/c/9b05e91afe948ed819bf87d7ba0fccf451ed79a6 Patch
- https://git.kernel.org/stable/c/9bba1a9994c523b44db64f63b564b4719ea2b7ef Patch
- https://git.kernel.org/stable/c/9d3211cb61a0773a2440d0a0698c1e6e7429f907 Patch
- https://git.kernel.org/stable/c/ac53f377393cc85156afdc90b636e84e544a6f96 Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.5 · linux, debianNVD modified 2026-10-19 21:10
Affected (CPE criteria) 2
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
References 12
- https://git.kernel.org/stable/c/1a7cf828ed861de5be1aff99e10f114b363c19d3 Patch
- https://git.kernel.org/stable/c/31d0599a23efdbfe579bfbd1eb8f8c942f13744d Patch
- https://git.kernel.org/stable/c/4b4317b0d758ff92ba96f4e448a8992a6fe607bf Patch
- https://git.kernel.org/stable/c/59f7d2138591ef8f0e4e4ab5f1ab674e8181ad3a Patch
- https://git.kernel.org/stable/c/89fdac333a17ed990b41565630ef4791782e02f5 Patch
- https://git.kernel.org/stable/c/9b05e91afe948ed819bf87d7ba0fccf451ed79a6 Patch
- https://git.kernel.org/stable/c/9bba1a9994c523b44db64f63b564b4719ea2b7ef Patch
- https://git.kernel.org/stable/c/9d3211cb61a0773a2440d0a0698c1e6e7429f907 Patch
- https://git.kernel.org/stable/c/ac53f377393cc85156afdc90b636e84e544a6f96 Patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html Mailing List, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html