CVE-2025-39742In 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, a…
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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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-369
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 19, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 4.8 before 5.4.297; from 5.5 before 5.10.241; from 5.11 before 5.15.190; from 5.16 before 6.1.149; from 6.2 before 6.6.103; from 6.7 before 6.12.43; from 6.13 before 6.15.11; from 6.16 before 6.16.2 | NVD |
debian debian_linux debian:debian_linux | 11.0 | NVD |
References
- https://git.kernel.org/stable/c/1a7cf828ed861de5be1aff99e10f114b363c19d3patch
- https://git.kernel.org/stable/c/31d0599a23efdbfe579bfbd1eb8f8c942f13744dpatch
- https://git.kernel.org/stable/c/4b4317b0d758ff92ba96f4e448a8992a6fe607bfpatch
- https://git.kernel.org/stable/c/59f7d2138591ef8f0e4e4ab5f1ab674e8181ad3apatch
- https://git.kernel.org/stable/c/89fdac333a17ed990b41565630ef4791782e02f5patch
- https://git.kernel.org/stable/c/9b05e91afe948ed819bf87d7ba0fccf451ed79a6patch
- https://git.kernel.org/stable/c/9bba1a9994c523b44db64f63b564b4719ea2b7efpatch
- https://git.kernel.org/stable/c/9d3211cb61a0773a2440d0a0698c1e6e7429f907patch
- https://git.kernel.org/stable/c/ac53f377393cc85156afdc90b636e84e544a6f96patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlmailing-list, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlmailing-list, third-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.